[libcxx-commits] [clang] [libcxx] Reapply "[Clang] Implement resolution for CWG1835 (#92957, #98547)" (PR #100425)
Krystian Stasiowski via libcxx-commits
libcxx-commits at lists.llvm.org
Tue Jul 30 08:07:07 PDT 2024
https://github.com/sdkrystian updated https://github.com/llvm/llvm-project/pull/100425
>From 18c19b2f056cf93b095a9dbad85b24ff89519d6b Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Thu, 11 Jul 2024 16:21:41 -0400
Subject: [PATCH 01/15] Reapply "[Clang] Implement resolution for CWG1835
(#92957)"
Reapplies #92957.
---
clang/docs/ReleaseNotes.rst | 3 +
clang/include/clang/AST/ExprCXX.h | 92 ++---
clang/include/clang/AST/Stmt.h | 15 +-
clang/include/clang/AST/UnresolvedSet.h | 4 +
.../clang/Basic/DiagnosticParseKinds.td | 4 +-
clang/include/clang/Parse/Parser.h | 14 +-
clang/include/clang/Sema/DeclSpec.h | 8 +
clang/include/clang/Sema/Lookup.h | 8 +-
clang/include/clang/Sema/Sema.h | 54 ++-
clang/lib/AST/ASTImporter.cpp | 12 +-
clang/lib/AST/ExprCXX.cpp | 67 ++--
clang/lib/AST/ItaniumMangle.cpp | 39 +--
clang/lib/Parse/ParseExpr.cpp | 7 +-
clang/lib/Parse/ParseExprCXX.cpp | 85 ++---
clang/lib/Sema/SemaCXXScopeSpec.cpp | 195 +++++------
clang/lib/Sema/SemaCoroutine.cpp | 4 +-
clang/lib/Sema/SemaDeclCXX.cpp | 47 ++-
clang/lib/Sema/SemaExpr.cpp | 2 +-
clang/lib/Sema/SemaExprMember.cpp | 74 ++--
clang/lib/Sema/SemaOverload.cpp | 12 +-
clang/lib/Sema/SemaStmtAsm.cpp | 8 +-
clang/lib/Sema/SemaTemplate.cpp | 218 ++++++------
clang/lib/Sema/SemaTemplateInstantiate.cpp | 17 +-
clang/lib/Sema/TreeTransform.h | 329 +++++++-----------
clang/lib/Serialization/ASTReaderStmt.cpp | 63 ++--
clang/lib/Serialization/ASTWriterStmt.cpp | 43 ++-
.../basic.lookup.classref/p1-cxx11.cpp | 14 +-
.../basic.lookup/basic.lookup.classref/p1.cpp | 14 +-
.../basic.lookup.qual.general/p3-example3.cpp | 27 ++
.../basic.lookup.qual.general/p3.cpp | 98 ++++++
.../class.derived/class.member.lookup/p8.cpp | 4 +-
clang/test/CXX/drs/cwg1xx.cpp | 8 +-
clang/test/CXX/temp/temp.names/p3-23.cpp | 237 +++++++++++++
clang/test/CXX/temp/temp.res/p3.cpp | 2 +-
clang/test/FixIt/fixit.cpp | 4 +-
clang/test/Misc/warning-flags.c | 2 +-
.../Parser/cxx2a-concepts-requires-expr.cpp | 2 +-
.../SemaCXX/cxx0x-noexcept-expression.cpp | 6 +-
clang/test/SemaCXX/pseudo-destructors.cpp | 18 +-
clang/test/SemaCXX/static-assert-cxx17.cpp | 2 +-
.../SemaTemplate/dependent-base-classes.cpp | 20 +-
.../dependent-template-recover.cpp | 12 +-
.../SemaTemplate/temp_arg_nontype_cxx20.cpp | 2 +-
clang/test/SemaTemplate/template-id-expr.cpp | 14 +-
.../SemaTemplate/typename-specifier-3.cpp | 2 +-
libcxx/include/regex | 2 +-
46 files changed, 1109 insertions(+), 805 deletions(-)
create mode 100644 clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3-example3.cpp
create mode 100644 clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3.cpp
create mode 100644 clang/test/CXX/temp/temp.names/p3-23.cpp
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 25a9f2836ba3d..6440300c3a59f 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -87,6 +87,9 @@ C++2c Feature Support
Resolutions to C++ Defect Reports
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+- Clang now correctly implements lookup for the terminal name of a member-qualified nested-name-specifier.
+ (`CWG1835: Dependent member lookup before < <https://cplusplus.github.io/CWG/issues/1835.html>`_).
+
C Language Changes
------------------
diff --git a/clang/include/clang/AST/ExprCXX.h b/clang/include/clang/AST/ExprCXX.h
index f86f1818110e6..fde7b4b7d8fea 100644
--- a/clang/include/clang/AST/ExprCXX.h
+++ b/clang/include/clang/AST/ExprCXX.h
@@ -3676,9 +3676,9 @@ class CXXUnresolvedConstructExpr final
/// an implicit access if a qualifier is provided.
class CXXDependentScopeMemberExpr final
: public Expr,
- private llvm::TrailingObjects<CXXDependentScopeMemberExpr,
- ASTTemplateKWAndArgsInfo,
- TemplateArgumentLoc, NamedDecl *> {
+ private llvm::TrailingObjects<
+ CXXDependentScopeMemberExpr, NestedNameSpecifierLoc, DeclAccessPair,
+ ASTTemplateKWAndArgsInfo, TemplateArgumentLoc> {
friend class ASTStmtReader;
friend class ASTStmtWriter;
friend TrailingObjects;
@@ -3691,17 +3691,15 @@ class CXXDependentScopeMemberExpr final
/// implicit accesses.
QualType BaseType;
- /// The nested-name-specifier that precedes the member name, if any.
- /// FIXME: This could be in principle store as a trailing object.
- /// However the performance impact of doing so should be investigated first.
- NestedNameSpecifierLoc QualifierLoc;
-
/// The member to which this member expression refers, which
/// can be name, overloaded operator, or destructor.
///
/// FIXME: could also be a template-id
DeclarationNameInfo MemberNameInfo;
+ /// The location of the '->' or '.' operator.
+ SourceLocation OperatorLoc;
+
// CXXDependentScopeMemberExpr is followed by several trailing objects,
// some of which optional. They are in order:
//
@@ -3721,8 +3719,16 @@ class CXXDependentScopeMemberExpr final
return CXXDependentScopeMemberExprBits.HasTemplateKWAndArgsInfo;
}
- bool hasFirstQualifierFoundInScope() const {
- return CXXDependentScopeMemberExprBits.HasFirstQualifierFoundInScope;
+ unsigned getNumUnqualifiedLookups() const {
+ return CXXDependentScopeMemberExprBits.NumUnqualifiedLookups;
+ }
+
+ unsigned numTrailingObjects(OverloadToken<NestedNameSpecifierLoc>) const {
+ return hasQualifier();
+ }
+
+ unsigned numTrailingObjects(OverloadToken<DeclAccessPair>) const {
+ return getNumUnqualifiedLookups();
}
unsigned numTrailingObjects(OverloadToken<ASTTemplateKWAndArgsInfo>) const {
@@ -3733,33 +3739,32 @@ class CXXDependentScopeMemberExpr final
return getNumTemplateArgs();
}
- unsigned numTrailingObjects(OverloadToken<NamedDecl *>) const {
- return hasFirstQualifierFoundInScope();
- }
-
CXXDependentScopeMemberExpr(const ASTContext &Ctx, Expr *Base,
QualType BaseType, bool IsArrow,
SourceLocation OperatorLoc,
NestedNameSpecifierLoc QualifierLoc,
SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierFoundInScope,
+ ArrayRef<DeclAccessPair> UnqualifiedLookups,
DeclarationNameInfo MemberNameInfo,
const TemplateArgumentListInfo *TemplateArgs);
- CXXDependentScopeMemberExpr(EmptyShell Empty, bool HasTemplateKWAndArgsInfo,
- bool HasFirstQualifierFoundInScope);
+ CXXDependentScopeMemberExpr(EmptyShell Empty, bool HasQualifier,
+ unsigned NumUnqualifiedLookups,
+ bool HasTemplateKWAndArgsInfo);
public:
static CXXDependentScopeMemberExpr *
Create(const ASTContext &Ctx, Expr *Base, QualType BaseType, bool IsArrow,
SourceLocation OperatorLoc, NestedNameSpecifierLoc QualifierLoc,
- SourceLocation TemplateKWLoc, NamedDecl *FirstQualifierFoundInScope,
+ SourceLocation TemplateKWLoc,
+ ArrayRef<DeclAccessPair> UnqualifiedLookups,
DeclarationNameInfo MemberNameInfo,
const TemplateArgumentListInfo *TemplateArgs);
static CXXDependentScopeMemberExpr *
- CreateEmpty(const ASTContext &Ctx, bool HasTemplateKWAndArgsInfo,
- unsigned NumTemplateArgs, bool HasFirstQualifierFoundInScope);
+ CreateEmpty(const ASTContext &Ctx, bool HasQualifier,
+ unsigned NumUnqualifiedLookups, bool HasTemplateKWAndArgsInfo,
+ unsigned NumTemplateArgs);
/// True if this is an implicit access, i.e. one in which the
/// member being accessed was not written in the source. The source
@@ -3784,34 +3789,35 @@ class CXXDependentScopeMemberExpr final
bool isArrow() const { return CXXDependentScopeMemberExprBits.IsArrow; }
/// Retrieve the location of the '->' or '.' operator.
- SourceLocation getOperatorLoc() const {
- return CXXDependentScopeMemberExprBits.OperatorLoc;
+ SourceLocation getOperatorLoc() const { return OperatorLoc; }
+
+ /// Determines whether this member expression had a nested-name-specifier
+ /// prior to the name of the member, e.g., x->Base::foo.
+ bool hasQualifier() const {
+ return CXXDependentScopeMemberExprBits.HasQualifier;
}
- /// Retrieve the nested-name-specifier that qualifies the member name.
- NestedNameSpecifier *getQualifier() const {
- return QualifierLoc.getNestedNameSpecifier();
+ /// If the member name was qualified, retrieves the nested-name-specifier
+ /// that precedes the member name, with source-location information.
+ NestedNameSpecifierLoc getQualifierLoc() const {
+ if (!hasQualifier())
+ return NestedNameSpecifierLoc();
+ return *getTrailingObjects<NestedNameSpecifierLoc>();
}
- /// Retrieve the nested-name-specifier that qualifies the member
- /// name, with source location information.
- NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }
+ /// If the member name was qualified, retrieves the
+ /// nested-name-specifier that precedes the member name. Otherwise, returns
+ /// NULL.
+ NestedNameSpecifier *getQualifier() const {
+ return getQualifierLoc().getNestedNameSpecifier();
+ }
- /// Retrieve the first part of the nested-name-specifier that was
- /// found in the scope of the member access expression when the member access
- /// was initially parsed.
- ///
- /// This function only returns a useful result when member access expression
- /// uses a qualified member name, e.g., "x.Base::f". Here, the declaration
- /// returned by this function describes what was found by unqualified name
- /// lookup for the identifier "Base" within the scope of the member access
- /// expression itself. At template instantiation time, this information is
- /// combined with the results of name lookup into the type of the object
- /// expression itself (the class type of x).
- NamedDecl *getFirstQualifierFoundInScope() const {
- if (!hasFirstQualifierFoundInScope())
- return nullptr;
- return *getTrailingObjects<NamedDecl *>();
+ /// Retrieve the declarations found by unqualified lookup for the first
+ /// component name of the nested-name-specifier, if any.
+ ArrayRef<DeclAccessPair> unqualified_lookups() const {
+ if (!getNumUnqualifiedLookups())
+ return std::nullopt;
+ return {getTrailingObjects<DeclAccessPair>(), getNumUnqualifiedLookups()};
}
/// Retrieve the name of the member that this expression refers to.
diff --git a/clang/include/clang/AST/Stmt.h b/clang/include/clang/AST/Stmt.h
index bbd7634bcc3bf..d0593865ee445 100644
--- a/clang/include/clang/AST/Stmt.h
+++ b/clang/include/clang/AST/Stmt.h
@@ -1020,18 +1020,19 @@ class alignas(void *) Stmt {
LLVM_PREFERRED_TYPE(bool)
unsigned IsArrow : 1;
+ /// True if this member expression used a nested-name-specifier to
+ /// refer to the member, e.g., "x->Base::f".
+ LLVM_PREFERRED_TYPE(bool)
+ unsigned HasQualifier : 1;
+
/// Whether this member expression has info for explicit template
/// keyword and arguments.
LLVM_PREFERRED_TYPE(bool)
unsigned HasTemplateKWAndArgsInfo : 1;
- /// See getFirstQualifierFoundInScope() and the comment listing
- /// the trailing objects.
- LLVM_PREFERRED_TYPE(bool)
- unsigned HasFirstQualifierFoundInScope : 1;
-
- /// The location of the '->' or '.' operator.
- SourceLocation OperatorLoc;
+ /// Number of declarations found by unqualified lookup for the
+ /// first component name of the nested-name-specifier.
+ unsigned NumUnqualifiedLookups;
};
class OverloadExprBitfields {
diff --git a/clang/include/clang/AST/UnresolvedSet.h b/clang/include/clang/AST/UnresolvedSet.h
index 1369725ab4e96..ef44499ce5926 100644
--- a/clang/include/clang/AST/UnresolvedSet.h
+++ b/clang/include/clang/AST/UnresolvedSet.h
@@ -97,6 +97,10 @@ class UnresolvedSetImpl {
decls().push_back(DeclAccessPair::make(D, AS));
}
+ void addAllDecls(ArrayRef<DeclAccessPair> Other) {
+ append(iterator(Other.begin()), iterator(Other.end()));
+ }
+
/// Replaces the given declaration with the new one, once.
///
/// \return true if the set changed
diff --git a/clang/include/clang/Basic/DiagnosticParseKinds.td b/clang/include/clang/Basic/DiagnosticParseKinds.td
index f8d50d12bb935..1f78652e631b6 100644
--- a/clang/include/clang/Basic/DiagnosticParseKinds.td
+++ b/clang/include/clang/Basic/DiagnosticParseKinds.td
@@ -895,9 +895,7 @@ def missing_template_arg_list_after_template_kw : Extension<
"keyword">, InGroup<DiagGroup<"missing-template-arg-list-after-template-kw">>,
DefaultError;
-def err_missing_dependent_template_keyword : Error<
- "use 'template' keyword to treat '%0' as a dependent template name">;
-def warn_missing_dependent_template_keyword : ExtWarn<
+def ext_missing_dependent_template_keyword : ExtWarn<
"use 'template' keyword to treat '%0' as a dependent template name">;
def ext_extern_template : Extension<
diff --git a/clang/include/clang/Parse/Parser.h b/clang/include/clang/Parse/Parser.h
index ba7d6866ebacd..99e6d8a343469 100644
--- a/clang/include/clang/Parse/Parser.h
+++ b/clang/include/clang/Parse/Parser.h
@@ -3374,15 +3374,11 @@ class Parser : public CodeCompletionHandler {
BaseResult ParseBaseSpecifier(Decl *ClassDecl);
AccessSpecifier getAccessSpecifierIfPresent() const;
- bool ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS,
- ParsedType ObjectType,
- bool ObjectHadErrors,
- SourceLocation TemplateKWLoc,
- IdentifierInfo *Name,
- SourceLocation NameLoc,
- bool EnteringContext,
- UnqualifiedId &Id,
- bool AssumeTemplateId);
+ bool ParseUnqualifiedIdTemplateId(
+ CXXScopeSpec &SS, ParsedType ObjectType, bool ObjectHadErrors,
+ SourceLocation TemplateKWLoc, SourceLocation TildeLoc,
+ IdentifierInfo *Name, SourceLocation NameLoc, bool EnteringContext,
+ UnqualifiedId &Id, bool AssumeTemplateId);
bool ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext,
ParsedType ObjectType,
UnqualifiedId &Result);
diff --git a/clang/include/clang/Sema/DeclSpec.h b/clang/include/clang/Sema/DeclSpec.h
index 425b6e2a0b30c..9c22c35535ede 100644
--- a/clang/include/clang/Sema/DeclSpec.h
+++ b/clang/include/clang/Sema/DeclSpec.h
@@ -75,6 +75,7 @@ class CXXScopeSpec {
SourceRange Range;
NestedNameSpecifierLocBuilder Builder;
ArrayRef<TemplateParameterList *> TemplateParamLists;
+ ArrayRef<DeclAccessPair> UnqualifiedLookups;
public:
SourceRange getRange() const { return Range; }
@@ -91,6 +92,13 @@ class CXXScopeSpec {
return TemplateParamLists;
}
+ void setUnqualifiedLookups(ArrayRef<DeclAccessPair> Found) {
+ UnqualifiedLookups = Found;
+ }
+ ArrayRef<DeclAccessPair> getUnqualifiedLookups() const {
+ return UnqualifiedLookups;
+ }
+
/// Retrieve the representation of the nested-name-specifier.
NestedNameSpecifier *getScopeRep() const {
return Builder.getRepresentation();
diff --git a/clang/include/clang/Sema/Lookup.h b/clang/include/clang/Sema/Lookup.h
index b0a08a05ac6a0..6b765ef3c980f 100644
--- a/clang/include/clang/Sema/Lookup.h
+++ b/clang/include/clang/Sema/Lookup.h
@@ -483,11 +483,15 @@ class LookupResult {
ResultKind = Found;
}
+ void addAllDecls(ArrayRef<DeclAccessPair> Other) {
+ Decls.addAllDecls(Other);
+ ResultKind = Found;
+ }
+
/// Add all the declarations from another set of lookup
/// results.
void addAllDecls(const LookupResult &Other) {
- Decls.append(Other.Decls.begin(), Other.Decls.end());
- ResultKind = Found;
+ addAllDecls(Other.Decls.pairs());
}
/// Determine whether no result was found because we could not
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 2ec6367eccea0..3e897aec55391 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -2804,7 +2804,8 @@ class Sema final : public SemaBase {
/// (e.g., Base::), perform name lookup for that identifier as a
/// nested-name-specifier within the given scope, and return the result of
/// that name lookup.
- NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS);
+ bool LookupFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS,
+ UnresolvedSetImpl &R);
/// Keeps information about an identifier in a nested-name-spec.
///
@@ -2844,9 +2845,6 @@ class Sema final : public SemaBase {
/// \param EnteringContext If true, enter the context specified by the
/// nested-name-specifier.
/// \param SS Optional nested name specifier preceding the identifier.
- /// \param ScopeLookupResult Provides the result of name lookup within the
- /// scope of the nested-name-specifier that was computed at template
- /// definition time.
/// \param ErrorRecoveryLookup Specifies if the method is called to improve
/// error recovery and what kind of recovery is performed.
/// \param IsCorrectedToColon If not null, suggestion of replace '::' -> ':'
@@ -2855,11 +2853,6 @@ class Sema final : public SemaBase {
/// not '::'.
/// \param OnlyNamespace If true, only considers namespaces in lookup.
///
- /// This routine differs only slightly from ActOnCXXNestedNameSpecifier, in
- /// that it contains an extra parameter \p ScopeLookupResult, which provides
- /// the result of name lookup within the scope of the nested-name-specifier
- /// that was computed at template definition time.
- ///
/// If ErrorRecoveryLookup is true, then this call is used to improve error
/// recovery. This means that it should not emit diagnostics, it should
/// just return true on failure. It also means it should only return a valid
@@ -2868,7 +2861,6 @@ class Sema final : public SemaBase {
/// specifier.
bool BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
bool EnteringContext, CXXScopeSpec &SS,
- NamedDecl *ScopeLookupResult,
bool ErrorRecoveryLookup,
bool *IsCorrectedToColon = nullptr,
bool OnlyNamespace = false);
@@ -8570,11 +8562,12 @@ class Sema final : public SemaBase {
const TemplateArgumentListInfo *TemplateArgs,
bool IsDefiniteInstance, const Scope *S);
- ExprResult ActOnDependentMemberExpr(
- Expr *Base, QualType BaseType, bool IsArrow, SourceLocation OpLoc,
- const CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope, const DeclarationNameInfo &NameInfo,
- const TemplateArgumentListInfo *TemplateArgs);
+ ExprResult
+ ActOnDependentMemberExpr(Expr *Base, QualType BaseType, bool IsArrow,
+ SourceLocation OpLoc, const CXXScopeSpec &SS,
+ SourceLocation TemplateKWLoc,
+ const DeclarationNameInfo &NameInfo,
+ const TemplateArgumentListInfo *TemplateArgs);
/// The main callback when the parser finds something like
/// expression . [nested-name-specifier] identifier
@@ -8630,15 +8623,14 @@ class Sema final : public SemaBase {
ExprResult BuildMemberReferenceExpr(
Expr *Base, QualType BaseType, SourceLocation OpLoc, bool IsArrow,
CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope, const DeclarationNameInfo &NameInfo,
+ const DeclarationNameInfo &NameInfo,
const TemplateArgumentListInfo *TemplateArgs, const Scope *S,
ActOnMemberAccessExtraArgs *ExtraArgs = nullptr);
ExprResult
BuildMemberReferenceExpr(Expr *Base, QualType BaseType, SourceLocation OpLoc,
bool IsArrow, const CXXScopeSpec &SS,
- SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope, LookupResult &R,
+ SourceLocation TemplateKWLoc, LookupResult &R,
const TemplateArgumentListInfo *TemplateArgs,
const Scope *S, bool SuppressQualifierCheck = false,
ActOnMemberAccessExtraArgs *ExtraArgs = nullptr);
@@ -11126,15 +11118,14 @@ class Sema final : public SemaBase {
QualType ObjectType, bool EnteringContext,
RequiredTemplateKind RequiredTemplate = SourceLocation(),
AssumedTemplateKind *ATK = nullptr,
- bool AllowTypoCorrection = true);
+ bool AllowTypoCorrection = true, bool MayBeNNS = false);
- TemplateNameKind isTemplateName(Scope *S, CXXScopeSpec &SS,
- bool hasTemplateKeyword,
- const UnqualifiedId &Name,
- ParsedType ObjectType, bool EnteringContext,
- TemplateTy &Template,
- bool &MemberOfUnknownSpecialization,
- bool Disambiguation = false);
+ TemplateNameKind
+ isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword,
+ const UnqualifiedId &Name, ParsedType ObjectType,
+ bool EnteringContext, TemplateTy &Template,
+ bool &MemberOfUnknownSpecialization,
+ bool Disambiguation = false, bool MayBeNNS = false);
/// Try to resolve an undeclared template name as a type template.
///
@@ -11467,12 +11458,11 @@ class Sema final : public SemaBase {
/// For example, given "x.MetaFun::template apply", the scope specifier
/// \p SS will be "MetaFun::", \p TemplateKWLoc contains the location
/// of the "template" keyword, and "apply" is the \p Name.
- TemplateNameKind ActOnTemplateName(Scope *S, CXXScopeSpec &SS,
- SourceLocation TemplateKWLoc,
- const UnqualifiedId &Name,
- ParsedType ObjectType,
- bool EnteringContext, TemplateTy &Template,
- bool AllowInjectedClassName = false);
+ TemplateNameKind
+ ActOnTemplateName(Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
+ const UnqualifiedId &Name, ParsedType ObjectType,
+ bool EnteringContext, TemplateTy &Template,
+ bool AllowInjectedClassName = false, bool MayBeNNS = false);
DeclResult ActOnClassTemplateSpecialization(
Scope *S, unsigned TagSpec, TagUseKind TUK, SourceLocation KWLoc,
diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
index da1981d8dd05f..e521f34a2b175 100644
--- a/clang/lib/AST/ASTImporter.cpp
+++ b/clang/lib/AST/ASTImporter.cpp
@@ -8438,8 +8438,14 @@ ExpectedStmt ASTNodeImporter::VisitCXXDependentScopeMemberExpr(
auto ToOperatorLoc = importChecked(Err, E->getOperatorLoc());
auto ToQualifierLoc = importChecked(Err, E->getQualifierLoc());
auto ToTemplateKeywordLoc = importChecked(Err, E->getTemplateKeywordLoc());
- auto ToFirstQualifierFoundInScope =
- importChecked(Err, E->getFirstQualifierFoundInScope());
+
+ UnresolvedSet<8> ToUnqualifiedLookups;
+ for (auto D : E->unqualified_lookups())
+ if (auto ToDOrErr = import(D.getDecl()))
+ ToUnqualifiedLookups.addDecl(*ToDOrErr);
+ else
+ return ToDOrErr.takeError();
+
if (Err)
return std::move(Err);
@@ -8473,7 +8479,7 @@ ExpectedStmt ASTNodeImporter::VisitCXXDependentScopeMemberExpr(
return CXXDependentScopeMemberExpr::Create(
Importer.getToContext(), ToBase, ToType, E->isArrow(), ToOperatorLoc,
- ToQualifierLoc, ToTemplateKeywordLoc, ToFirstQualifierFoundInScope,
+ ToQualifierLoc, ToTemplateKeywordLoc, ToUnqualifiedLookups.pairs(),
ToMemberNameInfo, ResInfo);
}
diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index e2c9643151126..e97c80141be0a 100644
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -1489,19 +1489,27 @@ SourceLocation CXXUnresolvedConstructExpr::getBeginLoc() const {
CXXDependentScopeMemberExpr::CXXDependentScopeMemberExpr(
const ASTContext &Ctx, Expr *Base, QualType BaseType, bool IsArrow,
SourceLocation OperatorLoc, NestedNameSpecifierLoc QualifierLoc,
- SourceLocation TemplateKWLoc, NamedDecl *FirstQualifierFoundInScope,
+ SourceLocation TemplateKWLoc, ArrayRef<DeclAccessPair> UnqualifiedLookups,
DeclarationNameInfo MemberNameInfo,
const TemplateArgumentListInfo *TemplateArgs)
: Expr(CXXDependentScopeMemberExprClass, Ctx.DependentTy, VK_LValue,
OK_Ordinary),
- Base(Base), BaseType(BaseType), QualifierLoc(QualifierLoc),
- MemberNameInfo(MemberNameInfo) {
+ Base(Base), BaseType(BaseType), MemberNameInfo(MemberNameInfo),
+ OperatorLoc(OperatorLoc) {
CXXDependentScopeMemberExprBits.IsArrow = IsArrow;
+ CXXDependentScopeMemberExprBits.HasQualifier = QualifierLoc.hasQualifier();
+ CXXDependentScopeMemberExprBits.NumUnqualifiedLookups =
+ UnqualifiedLookups.size();
CXXDependentScopeMemberExprBits.HasTemplateKWAndArgsInfo =
(TemplateArgs != nullptr) || TemplateKWLoc.isValid();
- CXXDependentScopeMemberExprBits.HasFirstQualifierFoundInScope =
- FirstQualifierFoundInScope != nullptr;
- CXXDependentScopeMemberExprBits.OperatorLoc = OperatorLoc;
+
+ if (hasQualifier())
+ new (getTrailingObjects<NestedNameSpecifierLoc>())
+ NestedNameSpecifierLoc(QualifierLoc);
+
+ std::uninitialized_copy_n(UnqualifiedLookups.data(),
+ UnqualifiedLookups.size(),
+ getTrailingObjects<DeclAccessPair>());
if (TemplateArgs) {
auto Deps = TemplateArgumentDependence::None;
@@ -1513,54 +1521,59 @@ CXXDependentScopeMemberExpr::CXXDependentScopeMemberExpr(
TemplateKWLoc);
}
- if (hasFirstQualifierFoundInScope())
- *getTrailingObjects<NamedDecl *>() = FirstQualifierFoundInScope;
setDependence(computeDependence(this));
}
CXXDependentScopeMemberExpr::CXXDependentScopeMemberExpr(
- EmptyShell Empty, bool HasTemplateKWAndArgsInfo,
- bool HasFirstQualifierFoundInScope)
+ EmptyShell Empty, bool HasQualifier, unsigned NumUnqualifiedLookups,
+ bool HasTemplateKWAndArgsInfo)
: Expr(CXXDependentScopeMemberExprClass, Empty) {
+ CXXDependentScopeMemberExprBits.HasQualifier = HasQualifier;
+ CXXDependentScopeMemberExprBits.NumUnqualifiedLookups = NumUnqualifiedLookups;
CXXDependentScopeMemberExprBits.HasTemplateKWAndArgsInfo =
HasTemplateKWAndArgsInfo;
- CXXDependentScopeMemberExprBits.HasFirstQualifierFoundInScope =
- HasFirstQualifierFoundInScope;
}
CXXDependentScopeMemberExpr *CXXDependentScopeMemberExpr::Create(
const ASTContext &Ctx, Expr *Base, QualType BaseType, bool IsArrow,
SourceLocation OperatorLoc, NestedNameSpecifierLoc QualifierLoc,
- SourceLocation TemplateKWLoc, NamedDecl *FirstQualifierFoundInScope,
+ SourceLocation TemplateKWLoc, ArrayRef<DeclAccessPair> UnqualifiedLookups,
DeclarationNameInfo MemberNameInfo,
const TemplateArgumentListInfo *TemplateArgs) {
+ bool HasQualifier = QualifierLoc.hasQualifier();
+ unsigned NumUnqualifiedLookups = UnqualifiedLookups.size();
+ assert(!NumUnqualifiedLookups || HasQualifier);
bool HasTemplateKWAndArgsInfo =
(TemplateArgs != nullptr) || TemplateKWLoc.isValid();
unsigned NumTemplateArgs = TemplateArgs ? TemplateArgs->size() : 0;
- bool HasFirstQualifierFoundInScope = FirstQualifierFoundInScope != nullptr;
-
- unsigned Size = totalSizeToAlloc<ASTTemplateKWAndArgsInfo,
- TemplateArgumentLoc, NamedDecl *>(
- HasTemplateKWAndArgsInfo, NumTemplateArgs, HasFirstQualifierFoundInScope);
+ unsigned Size =
+ totalSizeToAlloc<NestedNameSpecifierLoc, DeclAccessPair,
+ ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
+ HasQualifier, NumUnqualifiedLookups, HasTemplateKWAndArgsInfo,
+ NumTemplateArgs);
void *Mem = Ctx.Allocate(Size, alignof(CXXDependentScopeMemberExpr));
return new (Mem) CXXDependentScopeMemberExpr(
Ctx, Base, BaseType, IsArrow, OperatorLoc, QualifierLoc, TemplateKWLoc,
- FirstQualifierFoundInScope, MemberNameInfo, TemplateArgs);
+ UnqualifiedLookups, MemberNameInfo, TemplateArgs);
}
CXXDependentScopeMemberExpr *CXXDependentScopeMemberExpr::CreateEmpty(
- const ASTContext &Ctx, bool HasTemplateKWAndArgsInfo,
- unsigned NumTemplateArgs, bool HasFirstQualifierFoundInScope) {
- assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo);
+ const ASTContext &Ctx, bool HasQualifier, unsigned NumUnqualifiedLookups,
+ bool HasTemplateKWAndArgsInfo, unsigned NumTemplateArgs) {
+ assert(!NumTemplateArgs || HasTemplateKWAndArgsInfo);
+ assert(!NumUnqualifiedLookups || HasQualifier);
- unsigned Size = totalSizeToAlloc<ASTTemplateKWAndArgsInfo,
- TemplateArgumentLoc, NamedDecl *>(
- HasTemplateKWAndArgsInfo, NumTemplateArgs, HasFirstQualifierFoundInScope);
+ unsigned Size =
+ totalSizeToAlloc<NestedNameSpecifierLoc, DeclAccessPair,
+ ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
+ HasQualifier, NumUnqualifiedLookups, HasTemplateKWAndArgsInfo,
+ NumTemplateArgs);
void *Mem = Ctx.Allocate(Size, alignof(CXXDependentScopeMemberExpr));
- return new (Mem) CXXDependentScopeMemberExpr(
- EmptyShell(), HasTemplateKWAndArgsInfo, HasFirstQualifierFoundInScope);
+ return new (Mem) CXXDependentScopeMemberExpr(EmptyShell(), HasQualifier,
+ NumUnqualifiedLookups,
+ HasTemplateKWAndArgsInfo);
}
CXXThisExpr *CXXThisExpr::Create(const ASTContext &Ctx, SourceLocation L,
diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index d46d621d4c7d4..eea51199aa302 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -594,11 +594,10 @@ class CXXNameMangler {
void mangleMemberExprBase(const Expr *base, bool isArrow);
void mangleMemberExpr(const Expr *base, bool isArrow,
NestedNameSpecifier *qualifier,
- NamedDecl *firstQualifierLookup,
+ ArrayRef<DeclAccessPair> UnqualifiedLookups,
DeclarationName name,
const TemplateArgumentLoc *TemplateArgs,
- unsigned NumTemplateArgs,
- unsigned knownArity);
+ unsigned NumTemplateArgs, unsigned knownArity);
void mangleCastExpression(const Expr *E, StringRef CastEncoding);
void mangleInitListElements(const InitListExpr *InitList);
void mangleRequirement(SourceLocation RequiresExprLoc,
@@ -4496,14 +4495,11 @@ void CXXNameMangler::mangleMemberExprBase(const Expr *Base, bool IsArrow) {
}
/// Mangles a member expression.
-void CXXNameMangler::mangleMemberExpr(const Expr *base,
- bool isArrow,
- NestedNameSpecifier *qualifier,
- NamedDecl *firstQualifierLookup,
- DeclarationName member,
- const TemplateArgumentLoc *TemplateArgs,
- unsigned NumTemplateArgs,
- unsigned arity) {
+void CXXNameMangler::mangleMemberExpr(
+ const Expr *base, bool isArrow, NestedNameSpecifier *qualifier,
+ ArrayRef<DeclAccessPair> UnqualifiedLookups, DeclarationName member,
+ const TemplateArgumentLoc *TemplateArgs, unsigned NumTemplateArgs,
+ unsigned arity) {
// <expression> ::= dt <expression> <unresolved-name>
// ::= pt <expression> <unresolved-name>
if (base)
@@ -4985,11 +4981,9 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
case Expr::MemberExprClass: {
NotPrimaryExpr();
const MemberExpr *ME = cast<MemberExpr>(E);
- mangleMemberExpr(ME->getBase(), ME->isArrow(),
- ME->getQualifier(), nullptr,
- ME->getMemberDecl()->getDeclName(),
- ME->getTemplateArgs(), ME->getNumTemplateArgs(),
- Arity);
+ mangleMemberExpr(ME->getBase(), ME->isArrow(), ME->getQualifier(),
+ std::nullopt, ME->getMemberDecl()->getDeclName(),
+ ME->getTemplateArgs(), ME->getNumTemplateArgs(), Arity);
break;
}
@@ -4997,10 +4991,9 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
NotPrimaryExpr();
const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E);
mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
- ME->isArrow(), ME->getQualifier(), nullptr,
- ME->getMemberName(),
- ME->getTemplateArgs(), ME->getNumTemplateArgs(),
- Arity);
+ ME->isArrow(), ME->getQualifier(), std::nullopt,
+ ME->getMemberName(), ME->getTemplateArgs(),
+ ME->getNumTemplateArgs(), Arity);
break;
}
@@ -5010,10 +5003,8 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
= cast<CXXDependentScopeMemberExpr>(E);
mangleMemberExpr(ME->isImplicitAccess() ? nullptr : ME->getBase(),
ME->isArrow(), ME->getQualifier(),
- ME->getFirstQualifierFoundInScope(),
- ME->getMember(),
- ME->getTemplateArgs(), ME->getNumTemplateArgs(),
- Arity);
+ ME->unqualified_lookups(), ME->getMember(),
+ ME->getTemplateArgs(), ME->getNumTemplateArgs(), Arity);
break;
}
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index e82b565272831..5953717e75d97 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -2365,10 +2365,9 @@ Parser::ParsePostfixExpressionSuffix(ExprResult LHS) {
}
if (!LHS.isInvalid())
- LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.get(), OpLoc,
- OpKind, SS, TemplateKWLoc, Name,
- CurParsedObjCImpl ? CurParsedObjCImpl->Dcl
- : nullptr);
+ LHS = Actions.ActOnMemberAccessExpr(
+ getCurScope(), LHS.get(), OpLoc, OpKind, SS, TemplateKWLoc, Name,
+ CurParsedObjCImpl ? CurParsedObjCImpl->Dcl : nullptr);
if (!LHS.isInvalid()) {
if (Tok.is(tok::less))
checkPotentialAngleBracket(LHS);
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index c0eae73927cdd..ad0758a616380 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -100,7 +100,8 @@ void Parser::CheckForTemplateAndDigraph(Token &Next, ParsedType ObjectType,
bool MemberOfUnknownSpecialization;
if (!Actions.isTemplateName(getCurScope(), SS, /*hasTemplateKeyword=*/false,
TemplateName, ObjectType, EnteringContext,
- Template, MemberOfUnknownSpecialization))
+ Template, MemberOfUnknownSpecialization,
+ /*Disambiguation=*/false, /*MayBeNNS=*/true))
return;
FixDigraph(*this, PP, Next, SecondToken, tok::unknown,
@@ -353,7 +354,8 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
TemplateTy Template;
TemplateNameKind TNK = Actions.ActOnTemplateName(
getCurScope(), SS, TemplateKWLoc, TemplateName, ObjectType,
- EnteringContext, Template, /*AllowInjectedClassName*/ true);
+ EnteringContext, Template, /*AllowInjectedClassName*/ true,
+ /*MayBeNNS=*/true);
if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateKWLoc,
TemplateName, false))
return true;
@@ -405,7 +407,6 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
: TemplateId->TemplateNameLoc;
SS.SetInvalid(SourceRange(StartLoc, CCLoc));
}
-
continue;
}
@@ -532,12 +533,15 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
getCurScope(), SS,
/*hasTemplateKeyword=*/false, TemplateName, ObjectType,
EnteringContext, Template, MemberOfUnknownSpecialization,
- Disambiguation)) {
+ Disambiguation,
+ /*MayBeNNS=*/true)) {
// If lookup didn't find anything, we treat the name as a template-name
// anyway. C++20 requires this, and in prior language modes it improves
// error recovery. But before we commit to this, check that we actually
// have something that looks like a template-argument-list next.
- if (!IsTypename && TNK == TNK_Undeclared_template &&
+ if (!IsTypename &&
+ (TNK == TNK_Undeclared_template ||
+ (!HasScopeSpecifier && ObjectType)) &&
isTemplateArgumentList(1) == TPResult::False)
break;
@@ -565,11 +569,7 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
// member of an unknown specialization. However, this will only
// parse correctly as a template, so suggest the keyword 'template'
// before 'getAs' and treat this as a dependent template name.
- unsigned DiagID = diag::err_missing_dependent_template_keyword;
- if (getLangOpts().MicrosoftExt)
- DiagID = diag::warn_missing_dependent_template_keyword;
-
- Diag(Tok.getLocation(), DiagID)
+ Diag(Tok.getLocation(), diag::ext_missing_dependent_template_keyword)
<< II.getName()
<< FixItHint::CreateInsertion(Tok.getLocation(), "template ");
}
@@ -1919,12 +1919,12 @@ Parser::ParseCXXPseudoDestructor(Expr *Base, SourceLocation OpLoc,
// argument list. This affects examples such as
// void f(auto *p) { p->~X<int>(); }
// ... but there's no ambiguity, and nowhere to write 'template' in such an
- // example, so we accept it anyway.
- if (Tok.is(tok::less) &&
- ParseUnqualifiedIdTemplateId(
- SS, ObjectType, Base && Base->containsErrors(), SourceLocation(),
- Name, NameLoc, false, SecondTypeName,
- /*AssumeTemplateId=*/true))
+ // example, so we accept it anyway
+ if (Tok.is(tok::less) && ParseUnqualifiedIdTemplateId(
+ SS, ObjectType, Base && Base->containsErrors(),
+ /*TemplateKWLoc=*/SourceLocation(), TildeLoc,
+ Name, NameLoc, false, SecondTypeName,
+ /*AssumeTemplateId=*/true))
return ExprError();
return Actions.ActOnPseudoDestructorExpr(getCurScope(), Base, OpLoc, OpKind,
@@ -2531,8 +2531,9 @@ bool Parser::ParseCXXTypeSpecifierSeq(DeclSpec &DS, DeclaratorContext Context) {
/// \returns true if a parse error occurred, false otherwise.
bool Parser::ParseUnqualifiedIdTemplateId(
CXXScopeSpec &SS, ParsedType ObjectType, bool ObjectHadErrors,
- SourceLocation TemplateKWLoc, IdentifierInfo *Name, SourceLocation NameLoc,
- bool EnteringContext, UnqualifiedId &Id, bool AssumeTemplateId) {
+ SourceLocation TemplateKWLoc, SourceLocation TildeLoc, IdentifierInfo *Name,
+ SourceLocation NameLoc, bool EnteringContext, UnqualifiedId &Id,
+ bool AssumeTemplateId) {
assert(Tok.is(tok::less) && "Expected '<' to finish parsing a template-id");
TemplateTy Template;
@@ -2546,13 +2547,14 @@ bool Parser::ParseUnqualifiedIdTemplateId(
// this template-id is used to form a nested-name-specifier or not.
TNK = Actions.ActOnTemplateName(getCurScope(), SS, TemplateKWLoc, Id,
ObjectType, EnteringContext, Template,
- /*AllowInjectedClassName*/ true);
+ /*AllowInjectedClassName=*/true,
+ TildeLoc.isValid());
} else {
bool MemberOfUnknownSpecialization;
- TNK = Actions.isTemplateName(getCurScope(), SS,
- TemplateKWLoc.isValid(), Id,
- ObjectType, EnteringContext, Template,
- MemberOfUnknownSpecialization);
+ TNK = Actions.isTemplateName(
+ getCurScope(), SS, TemplateKWLoc.isValid(), Id, ObjectType,
+ EnteringContext, Template, MemberOfUnknownSpecialization,
+ /*Disambiguation=*/false, TildeLoc.isValid());
// If lookup found nothing but we're assuming that this is a template
// name, double-check that makes sense syntactically before committing
// to it.
@@ -2579,13 +2581,13 @@ bool Parser::ParseUnqualifiedIdTemplateId(
else
Name += Id.Identifier->getName();
}
- Diag(Id.StartLocation, diag::err_missing_dependent_template_keyword)
+ Diag(Id.StartLocation, diag::ext_missing_dependent_template_keyword)
<< Name
<< FixItHint::CreateInsertion(Id.StartLocation, "template ");
}
TNK = Actions.ActOnTemplateName(
getCurScope(), SS, TemplateKWLoc, Id, ObjectType, EnteringContext,
- Template, /*AllowInjectedClassName*/ true);
+ Template, /*AllowInjectedClassName=*/true, TildeLoc.isValid());
} else if (TNK == TNK_Non_template) {
return false;
}
@@ -2610,14 +2612,16 @@ bool Parser::ParseUnqualifiedIdTemplateId(
bool MemberOfUnknownSpecialization;
TemplateName.setIdentifier(Name, NameLoc);
if (ObjectType) {
- TNK = Actions.ActOnTemplateName(
- getCurScope(), SS, TemplateKWLoc, TemplateName, ObjectType,
- EnteringContext, Template, /*AllowInjectedClassName*/ true);
+ TNK = Actions.ActOnTemplateName(getCurScope(), SS, TemplateKWLoc,
+ TemplateName, ObjectType, EnteringContext,
+ Template, /*AllowInjectedClassName=*/true,
+ /*MayBeNNS=*/true);
} else {
TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(),
- TemplateName, ObjectType,
- EnteringContext, Template,
- MemberOfUnknownSpecialization);
+ TemplateName, ObjectType, EnteringContext,
+ Template, MemberOfUnknownSpecialization,
+ /*Disambiguation=*/false,
+ /*MayBeNNS=*/true);
if (TNK == TNK_Non_template && !Id.DestructorName.get()) {
Diag(NameLoc, diag::err_destructor_template_id)
@@ -2679,7 +2683,7 @@ bool Parser::ParseUnqualifiedIdTemplateId(
if (Id.getKind() == UnqualifiedIdKind::IK_ConstructorName)
Id.setConstructorName(Type.get(), NameLoc, RAngleLoc);
else
- Id.setDestructorName(Id.StartLocation, Type.get(), RAngleLoc);
+ Id.setDestructorName(TildeLoc, Type.get(), RAngleLoc);
return false;
}
@@ -3027,8 +3031,9 @@ bool Parser::ParseUnqualifiedId(CXXScopeSpec &SS, ParsedType ObjectType,
if (Tok.is(tok::less))
return ParseUnqualifiedIdTemplateId(
SS, ObjectType, ObjectHadErrors,
- TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), Id, IdLoc,
- EnteringContext, Result, TemplateSpecified);
+ TemplateKWLoc ? *TemplateKWLoc : SourceLocation(),
+ /*TildeLoc=*/SourceLocation(), Id, IdLoc, EnteringContext, Result,
+ TemplateSpecified);
if (TemplateSpecified) {
TemplateNameKind TNK =
@@ -3123,13 +3128,15 @@ bool Parser::ParseUnqualifiedId(CXXScopeSpec &SS, ParsedType ObjectType,
Tok.is(tok::less))
return ParseUnqualifiedIdTemplateId(
SS, ObjectType, ObjectHadErrors,
- TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), nullptr,
- SourceLocation(), EnteringContext, Result, TemplateSpecified);
+ TemplateKWLoc ? *TemplateKWLoc : SourceLocation(),
+ /*TildeLoc=*/SourceLocation(), /*Name=*/nullptr,
+ /*NameLoc=*/SourceLocation(), EnteringContext, Result,
+ TemplateSpecified);
else if (TemplateSpecified &&
Actions.ActOnTemplateName(
getCurScope(), SS, *TemplateKWLoc, Result, ObjectType,
EnteringContext, Template,
- /*AllowInjectedClassName*/ true) == TNK_Non_template)
+ /*AllowInjectedClassName=*/true) == TNK_Non_template)
return true;
return false;
@@ -3219,8 +3226,8 @@ bool Parser::ParseUnqualifiedId(CXXScopeSpec &SS, ParsedType ObjectType,
Result.setDestructorName(TildeLoc, nullptr, ClassNameLoc);
return ParseUnqualifiedIdTemplateId(
SS, ObjectType, ObjectHadErrors,
- TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), ClassName,
- ClassNameLoc, EnteringContext, Result, TemplateSpecified);
+ TemplateKWLoc ? *TemplateKWLoc : SourceLocation(), TildeLoc,
+ ClassName, ClassNameLoc, EnteringContext, Result, TemplateSpecified);
}
// Note that this is a destructor name.
diff --git a/clang/lib/Sema/SemaCXXScopeSpec.cpp b/clang/lib/Sema/SemaCXXScopeSpec.cpp
index 5b2d65247e72e..dd61bb22e3dfa 100644
--- a/clang/lib/Sema/SemaCXXScopeSpec.cpp
+++ b/clang/lib/Sema/SemaCXXScopeSpec.cpp
@@ -356,29 +356,41 @@ bool Sema::isAcceptableNestedNameSpecifier(const NamedDecl *SD,
return false;
}
-NamedDecl *Sema::FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS) {
- if (!S || !NNS)
- return nullptr;
+/// If the given nested-name-specifier begins with a bare identifier
+/// (e.g., Base::), perform name lookup for that identifier as a
+/// nested-name-specifier within the given scope, and return the result of that
+/// name lookup.
+bool Sema::LookupFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS,
+ UnresolvedSetImpl &R) {
+ if (!S)
+ return false;
while (NNS->getPrefix())
NNS = NNS->getPrefix();
- if (NNS->getKind() != NestedNameSpecifier::Identifier)
- return nullptr;
-
- LookupResult Found(*this, NNS->getAsIdentifier(), SourceLocation(),
- LookupNestedNameSpecifierName);
+ // FIXME: This is a rather nasty hack! Ideally we should get the results
+ // from LookupTemplateName/BuildCXXNestedNameSpecifier.
+ const IdentifierInfo *II = NNS->getAsIdentifier();
+ if (!II) {
+ if (const auto *DTST =
+ dyn_cast_if_present<DependentTemplateSpecializationType>(
+ NNS->getAsType()))
+ II = DTST->getIdentifier();
+ else
+ return false;
+ }
+ assert(II && "Missing first qualifier in scope");
+ LookupResult Found(*this, II, SourceLocation(),
+ NNS->getAsIdentifier() ? LookupNestedNameSpecifierName
+ : LookupOrdinaryName);
LookupName(Found, S);
- assert(!Found.isAmbiguous() && "Cannot handle ambiguities here yet");
- if (!Found.isSingleResult())
- return nullptr;
-
- NamedDecl *Result = Found.getFoundDecl();
- if (isAcceptableNestedNameSpecifier(Result))
- return Result;
+ if (Found.empty())
+ return false;
- return nullptr;
+ R.addAllDecls(Found.asUnresolvedSet().pairs());
+ Found.suppressDiagnostics();
+ return true;
}
namespace {
@@ -407,112 +419,82 @@ class NestedNameSpecifierValidatorCCC final
bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
bool EnteringContext, CXXScopeSpec &SS,
- NamedDecl *ScopeLookupResult,
bool ErrorRecoveryLookup,
bool *IsCorrectedToColon,
bool OnlyNamespace) {
if (IdInfo.Identifier->isEditorPlaceholder())
return true;
+ if (IsCorrectedToColon)
+ *IsCorrectedToColon = false;
+
+ QualType ObjectType = GetTypeFromParser(IdInfo.ObjectType);
LookupResult Found(*this, IdInfo.Identifier, IdInfo.IdentifierLoc,
OnlyNamespace ? LookupNamespaceName
: LookupNestedNameSpecifierName);
- QualType ObjectType = GetTypeFromParser(IdInfo.ObjectType);
- // Determine where to perform name lookup
- DeclContext *LookupCtx = nullptr;
- bool isDependent = false;
- if (IsCorrectedToColon)
- *IsCorrectedToColon = false;
- if (!ObjectType.isNull()) {
- // This nested-name-specifier occurs in a member access expression, e.g.,
- // x->B::f, and we are looking into the type of the object.
- assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist");
- LookupCtx = computeDeclContext(ObjectType);
- isDependent = ObjectType->isDependentType();
- } else if (SS.isSet()) {
- // This nested-name-specifier occurs after another nested-name-specifier,
- // so look into the context associated with the prior nested-name-specifier.
- LookupCtx = computeDeclContext(SS, EnteringContext);
- isDependent = isDependentScopeSpecifier(SS);
- Found.setContextRange(SS.getRange());
+ // C++ [basic.lookup.qual.general]p3:
+ // Qualified name lookup in a class, namespace, or enumeration performs a
+ // search of the scope associated with it except as specified below.
+ LookupParsedName(Found, S, &SS, ObjectType,
+ /*AllowBuiltinCreation=*/false, EnteringContext);
+
+ // C++ [basic.lookup.qual.general]p3:
+ // [...] Unless otherwise specified, a qualified name undergoes qualified
+ // name lookup in its lookup context from the point where it appears unless
+ // the lookup context either is dependent and is not the current
+ // instantiation or is not a class or class template.
+ if (Found.wasNotFoundInCurrentInstantiation()) {
+ // Don't speculate if we're just trying to improve error recovery.
+ if (ErrorRecoveryLookup)
+ return true;
+
+ // The lookup context is dependent and either:
+ // - it is not the current instantiation, or
+ // - it is the current instantiation, it has at least one dependent base
+ // class, and qualified lookup found nothing.
+ // Build a dependent nested-name-specifier. We will lookup the name again
+ // during instantiation.
+ SS.Extend(Context, IdInfo.Identifier, IdInfo.IdentifierLoc, IdInfo.CCLoc);
+ return false;
}
bool ObjectTypeSearchedInScope = false;
- if (LookupCtx) {
- // Perform "qualified" name lookup into the declaration context we
- // computed, which is either the type of the base of a member access
- // expression or the declaration context associated with a prior
- // nested-name-specifier.
-
- // The declaration context must be complete.
- if (!LookupCtx->isDependentContext() &&
- RequireCompleteDeclContext(SS, LookupCtx))
- return true;
- LookupQualifiedName(Found, LookupCtx);
-
- if (!ObjectType.isNull() && Found.empty()) {
- // C++ [basic.lookup.classref]p4:
- // If the id-expression in a class member access is a qualified-id of
- // the form
- //
- // class-name-or-namespace-name::...
- //
- // the class-name-or-namespace-name following the . or -> operator is
- // looked up both in the context of the entire postfix-expression and in
- // the scope of the class of the object expression. If the name is found
- // only in the scope of the class of the object expression, the name
- // shall refer to a class-name. If the name is found only in the
- // context of the entire postfix-expression, the name shall refer to a
- // class-name or namespace-name. [...]
- //
- // Qualified name lookup into a class will not find a namespace-name,
- // so we do not need to diagnose that case specifically. However,
- // this qualified name lookup may find nothing. In that case, perform
- // unqualified name lookup in the given scope (if available) or
- // reconstruct the result from when name lookup was performed at template
- // definition time.
- if (S)
- LookupName(Found, S);
- else if (ScopeLookupResult)
- Found.addDecl(ScopeLookupResult);
-
- ObjectTypeSearchedInScope = true;
+ // C++ [basic.lookup.qual.general]p2:
+ // A member-qualified name is the (unique) component name, if any, of
+ // - an unqualified-id or
+ // - a nested-name-specifier of the form type-name :: or namespace-name ::
+ // in the id-expression of a class member access expression.
+ //
+ // C++ [basic.lookup.qual.general]p3:
+ // [...] If nothing is found by qualified lookup for a member-qualified
+ // name that is the terminal name of a nested-name-specifier and is not
+ // dependent, it undergoes unqualified lookup.
+ //
+ // In 'x.A::B::y', 'A' will undergo unqualified lookup if qualified lookup
+ // in the type of 'x' finds nothing. If the lookup context is dependent,
+ // we perform the unqualified lookup in the template definition context
+ // and store the results so we can replicate the lookup during instantiation.
+ if (Found.empty() && !ObjectType.isNull()) {
+ if (S) {
+ LookupName(Found, S);
+ } else if (!SS.getUnqualifiedLookups().empty()) {
+ Found.addAllDecls(SS.getUnqualifiedLookups());
+ Found.resolveKind();
}
- } else if (!isDependent) {
- // Perform unqualified name lookup in the current scope.
- LookupName(Found, S);
+ ObjectTypeSearchedInScope = true;
}
if (Found.isAmbiguous())
return true;
- // If we performed lookup into a dependent context and did not find anything,
- // that's fine: just build a dependent nested-name-specifier.
- if (Found.empty() && isDependent &&
- !(LookupCtx && LookupCtx->isRecord() &&
- (!cast<CXXRecordDecl>(LookupCtx)->hasDefinition() ||
- !cast<CXXRecordDecl>(LookupCtx)->hasAnyDependentBases()))) {
- // Don't speculate if we're just trying to improve error recovery.
- if (ErrorRecoveryLookup)
- return true;
-
- // We were not able to compute the declaration context for a dependent
- // base object type or prior nested-name-specifier, so this
- // nested-name-specifier refers to an unknown specialization. Just build
- // a dependent nested-name-specifier.
- SS.Extend(Context, IdInfo.Identifier, IdInfo.IdentifierLoc, IdInfo.CCLoc);
- return false;
- }
-
if (Found.empty() && !ErrorRecoveryLookup) {
// If identifier is not found as class-name-or-namespace-name, but is found
// as other entity, don't look for typos.
LookupResult R(*this, Found.getLookupNameInfo(), LookupOrdinaryName);
- if (LookupCtx)
- LookupQualifiedName(R, LookupCtx);
- else if (S && !isDependent)
- LookupName(R, S);
+ LookupParsedName(R, S, &SS, ObjectType,
+ /*AllowBuiltinCreation=*/false, EnteringContext);
+
if (!R.empty()) {
// Don't diagnose problems with this speculative lookup.
R.suppressDiagnostics();
@@ -539,6 +521,11 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
}
}
+ DeclContext *LookupCtx =
+ SS.isSet()
+ ? computeDeclContext(SS, EnteringContext)
+ : (!ObjectType.isNull() ? computeDeclContext(ObjectType) : nullptr);
+
if (Found.empty() && !ErrorRecoveryLookup && !getLangOpts().MSVCCompat) {
// We haven't found anything, and we're not recovering from a
// different kind of error, so look for typos.
@@ -594,14 +581,14 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
// scope, reconstruct the result from the template instantiation itself.
//
// Note that C++11 does *not* perform this redundant lookup.
- NamedDecl *OuterDecl;
+ NamedDecl *OuterDecl = nullptr;
if (S) {
LookupResult FoundOuter(*this, IdInfo.Identifier, IdInfo.IdentifierLoc,
LookupNestedNameSpecifierName);
LookupName(FoundOuter, S);
OuterDecl = FoundOuter.getAsSingle<NamedDecl>();
- } else
- OuterDecl = ScopeLookupResult;
+ } else if (!SS.getUnqualifiedLookups().empty())
+ OuterDecl = SS.getUnqualifiedLookups().front().getDecl();
if (isAcceptableNestedNameSpecifier(OuterDecl) &&
OuterDecl->getCanonicalDecl() != SD->getCanonicalDecl() &&
@@ -779,7 +766,7 @@ bool Sema::ActOnCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
return true;
return BuildCXXNestedNameSpecifier(S, IdInfo, EnteringContext, SS,
- /*ScopeLookupResult=*/nullptr, false,
+ /*ErrorRecoveryLookup=*/false,
IsCorrectedToColon, OnlyNamespace);
}
@@ -840,7 +827,7 @@ bool Sema::IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS,
return false;
return !BuildCXXNestedNameSpecifier(S, IdInfo, EnteringContext, SS,
- /*ScopeLookupResult=*/nullptr, true);
+ /*ErrorRecoveryLookup=*/true);
}
bool Sema::ActOnCXXNestedNameSpecifier(Scope *S,
diff --git a/clang/lib/Sema/SemaCoroutine.cpp b/clang/lib/Sema/SemaCoroutine.cpp
index 81334c817b2af..fa0eb1d2afbee 100644
--- a/clang/lib/Sema/SemaCoroutine.cpp
+++ b/clang/lib/Sema/SemaCoroutine.cpp
@@ -306,8 +306,8 @@ static ExprResult buildMemberCall(Sema &S, Expr *Base, SourceLocation Loc,
// FIXME: Fix BuildMemberReferenceExpr to take a const CXXScopeSpec&.
CXXScopeSpec SS;
ExprResult Result = S.BuildMemberReferenceExpr(
- Base, Base->getType(), Loc, /*IsPtr=*/false, SS,
- SourceLocation(), nullptr, NameInfo, /*TemplateArgs=*/nullptr,
+ Base, Base->getType(), Loc, /*IsPtr=*/false, SS, SourceLocation(),
+ NameInfo, /*TemplateArgs=*/nullptr,
/*Scope=*/nullptr);
if (Result.isInvalid())
return ExprError();
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 5782daa041f32..42a3dcd657e20 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -1275,9 +1275,11 @@ static bool checkTupleLikeDecomposition(Sema &S,
if (UseMemberGet) {
// if [lookup of member get] finds at least one declaration, the
// initializer is e.get<i-1>().
- E = S.BuildMemberReferenceExpr(E.get(), DecompType, Loc, false,
- CXXScopeSpec(), SourceLocation(), nullptr,
- MemberGet, &Args, nullptr);
+ E = S.BuildMemberReferenceExpr(E.get(), DecompType, Loc,
+ /*IsArrow=*/false,
+ /*SS=*/CXXScopeSpec(),
+ /*TemplateKWLoc=*/SourceLocation(),
+ MemberGet, &Args, /*S=*/nullptr);
if (E.isInvalid())
return true;
@@ -4899,16 +4901,12 @@ BuildImplicitMemberInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor,
MemberLookup.addDecl(Indirect ? cast<ValueDecl>(Indirect)
: cast<ValueDecl>(Field), AS_public);
MemberLookup.resolveKind();
- ExprResult CtorArg
- = SemaRef.BuildMemberReferenceExpr(MemberExprBase,
- ParamType, Loc,
- /*IsArrow=*/false,
- SS,
- /*TemplateKWLoc=*/SourceLocation(),
- /*FirstQualifierInScope=*/nullptr,
- MemberLookup,
- /*TemplateArgs=*/nullptr,
- /*S*/nullptr);
+ ExprResult CtorArg = SemaRef.BuildMemberReferenceExpr(
+ MemberExprBase, ParamType, Loc,
+ /*IsArrow=*/false, SS,
+ /*TemplateKWLoc=*/SourceLocation(), MemberLookup,
+ /*TemplateArgs=*/nullptr,
+ /*S=*/nullptr);
if (CtorArg.isInvalid())
return true;
@@ -14362,8 +14360,10 @@ class MemberBuilder: public ExprBuilder {
public:
Expr *build(Sema &S, SourceLocation Loc) const override {
return assertNotNull(S.BuildMemberReferenceExpr(
- Builder.build(S, Loc), Type, Loc, IsArrow, SS, SourceLocation(),
- nullptr, MemberLookup, nullptr, nullptr).get());
+ Builder.build(S, Loc), Type, Loc, IsArrow, SS,
+ /*TemplateKwLoc=*/SourceLocation(), MemberLookup,
+ /*TemplateArgs=*/nullptr, /*S=*/nullptr)
+ .get());
}
MemberBuilder(const ExprBuilder &Builder, QualType Type, bool IsArrow,
@@ -14569,13 +14569,11 @@ buildSingleCopyAssignRecursively(Sema &S, SourceLocation Loc, QualType T,
Loc);
// Create the reference to operator=.
- ExprResult OpEqualRef
- = S.BuildMemberReferenceExpr(To.build(S, Loc), T, Loc, /*IsArrow=*/false,
- SS, /*TemplateKWLoc=*/SourceLocation(),
- /*FirstQualifierInScope=*/nullptr,
- OpLookup,
- /*TemplateArgs=*/nullptr, /*S*/nullptr,
- /*SuppressQualifierCheck=*/true);
+ ExprResult OpEqualRef = S.BuildMemberReferenceExpr(
+ To.build(S, Loc), T, Loc, /*IsArrow=*/false, SS,
+ /*TemplateKWLoc=*/SourceLocation(), OpLookup,
+ /*TemplateArgs=*/nullptr, /*S*/ nullptr,
+ /*SuppressQualifierCheck=*/true);
if (OpEqualRef.isInvalid())
return StmtError();
@@ -17181,8 +17179,9 @@ bool Sema::EvaluateStaticAssertMessageAsString(Expr *Message,
auto BuildExpr = [&](LookupResult &LR) {
ExprResult Res = BuildMemberReferenceExpr(
- Message, Message->getType(), Message->getBeginLoc(), false,
- CXXScopeSpec(), SourceLocation(), nullptr, LR, nullptr, nullptr);
+ Message, Message->getType(), Message->getBeginLoc(), /*IsArrow=*/false,
+ /*SS=*/CXXScopeSpec(), /*TemplateKWLoc=*/SourceLocation(), LR,
+ /*TemplateArgs=*/nullptr, /*S=*/nullptr);
if (Res.isInvalid())
return ExprError();
Res = BuildCallExpr(nullptr, Res.get(), Loc, std::nullopt, Loc, nullptr,
diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index 74c0e01705905..e0db2e370928b 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -2632,7 +2632,7 @@ recoverFromMSUnqualifiedLookup(Sema &S, ASTContext &Context,
return CXXDependentScopeMemberExpr::Create(
Context, /*This=*/nullptr, ThisType, /*IsArrow=*/true,
/*Op=*/SourceLocation(), NestedNameSpecifierLoc(), TemplateKWLoc,
- /*FirstQualifierFoundInScope=*/nullptr, NameInfo, TemplateArgs);
+ /*UnqualifiedLookups=*/std::nullopt, NameInfo, TemplateArgs);
}
// Synthesize a fake NNS that points to the derived class. This will
diff --git a/clang/lib/Sema/SemaExprMember.cpp b/clang/lib/Sema/SemaExprMember.cpp
index 2070f3b7bb3a2..8519618bacfee 100644
--- a/clang/lib/Sema/SemaExprMember.cpp
+++ b/clang/lib/Sema/SemaExprMember.cpp
@@ -552,11 +552,9 @@ static Decl *FindGetterSetterNameDecl(const ObjCObjectPointerType *QIdTy,
}
ExprResult
-Sema::ActOnDependentMemberExpr(Expr *BaseExpr, QualType BaseType,
- bool IsArrow, SourceLocation OpLoc,
- const CXXScopeSpec &SS,
+Sema::ActOnDependentMemberExpr(Expr *BaseExpr, QualType BaseType, bool IsArrow,
+ SourceLocation OpLoc, const CXXScopeSpec &SS,
SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope,
const DeclarationNameInfo &NameInfo,
const TemplateArgumentListInfo *TemplateArgs) {
// Even in dependent contexts, try to diagnose base expressions with
@@ -590,8 +588,8 @@ Sema::ActOnDependentMemberExpr(Expr *BaseExpr, QualType BaseType,
// must have pointer type, and the accessed type is the pointee.
return CXXDependentScopeMemberExpr::Create(
Context, BaseExpr, BaseType, IsArrow, OpLoc,
- SS.getWithLocInContext(Context), TemplateKWLoc, FirstQualifierInScope,
- NameInfo, TemplateArgs);
+ SS.getWithLocInContext(Context), TemplateKWLoc,
+ SS.getUnqualifiedLookups(), NameInfo, TemplateArgs);
}
/// We know that the given qualified member reference points only to
@@ -767,8 +765,9 @@ static bool LookupMemberExprInRecord(Sema &SemaRef, LookupResult &R,
R.addDecl(ND);
R.resolveKind();
return SemaRef.BuildMemberReferenceExpr(
- BaseExpr, BaseExpr->getType(), OpLoc, IsArrow, SS, SourceLocation(),
- nullptr, R, nullptr, nullptr);
+ BaseExpr, BaseExpr->getType(), OpLoc, IsArrow, SS,
+ /*TemplateKWLoc=*/SourceLocation(), R, /*TemplateArgs=*/nullptr,
+ /*S=*/nullptr);
},
Sema::CTK_ErrorRecovery, DC);
@@ -784,7 +783,7 @@ static ExprResult LookupMemberExpr(Sema &S, LookupResult &R,
ExprResult Sema::BuildMemberReferenceExpr(
Expr *Base, QualType BaseType, SourceLocation OpLoc, bool IsArrow,
CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope, const DeclarationNameInfo &NameInfo,
+ const DeclarationNameInfo &NameInfo,
const TemplateArgumentListInfo *TemplateArgs, const Scope *S,
ActOnMemberAccessExtraArgs *ExtraArgs) {
LookupResult R(*this, NameInfo, LookupMemberName);
@@ -828,10 +827,9 @@ ExprResult Sema::BuildMemberReferenceExpr(
if (SS.isInvalid())
return ExprError();
- return BuildMemberReferenceExpr(Base, BaseType,
- OpLoc, IsArrow, SS, TemplateKWLoc,
- FirstQualifierInScope, R, TemplateArgs, S,
- false, ExtraArgs);
+ return BuildMemberReferenceExpr(Base, BaseType, OpLoc, IsArrow, SS,
+ TemplateKWLoc, R, TemplateArgs, S,
+ /*SuppressQualifierCheck=*/false, ExtraArgs);
}
ExprResult
@@ -969,17 +967,11 @@ static bool IsInFnTryBlockHandler(const Scope *S) {
return false;
}
-ExprResult
-Sema::BuildMemberReferenceExpr(Expr *BaseExpr, QualType BaseExprType,
- SourceLocation OpLoc, bool IsArrow,
- const CXXScopeSpec &SS,
- SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope,
- LookupResult &R,
- const TemplateArgumentListInfo *TemplateArgs,
- const Scope *S,
- bool SuppressQualifierCheck,
- ActOnMemberAccessExtraArgs *ExtraArgs) {
+ExprResult Sema::BuildMemberReferenceExpr(
+ Expr *BaseExpr, QualType BaseExprType, SourceLocation OpLoc, bool IsArrow,
+ const CXXScopeSpec &SS, SourceLocation TemplateKWLoc, LookupResult &R,
+ const TemplateArgumentListInfo *TemplateArgs, const Scope *S,
+ bool SuppressQualifierCheck, ActOnMemberAccessExtraArgs *ExtraArgs) {
assert(!SS.isInvalid() && "nested-name-specifier cannot be invalid");
// If the member wasn't found in the current instantiation, or if the
// arrow operator was used with a dependent non-pointer object expression,
@@ -989,8 +981,8 @@ Sema::BuildMemberReferenceExpr(Expr *BaseExpr, QualType BaseExprType,
(SS.isSet() ? SS.getScopeRep()->isDependent()
: BaseExprType->isDependentType())))
return ActOnDependentMemberExpr(BaseExpr, BaseExprType, IsArrow, OpLoc, SS,
- TemplateKWLoc, FirstQualifierInScope,
- R.getLookupNameInfo(), TemplateArgs);
+ TemplateKWLoc, R.getLookupNameInfo(),
+ TemplateArgs);
QualType BaseType = BaseExprType;
if (IsArrow) {
@@ -1195,9 +1187,9 @@ Sema::BuildMemberReferenceExpr(Expr *BaseExpr, QualType BaseExprType,
// Non-dependent member, but dependent template arguments.
if (!VDecl.get())
- return ActOnDependentMemberExpr(
- BaseExpr, BaseExpr->getType(), IsArrow, OpLoc, SS, TemplateKWLoc,
- FirstQualifierInScope, MemberNameInfo, TemplateArgs);
+ return ActOnDependentMemberExpr(BaseExpr, BaseExpr->getType(), IsArrow,
+ OpLoc, SS, TemplateKWLoc, MemberNameInfo,
+ TemplateArgs);
VarDecl *Var = cast<VarDecl>(VDecl.get());
if (!Var->getTemplateSpecializationKind())
@@ -1763,15 +1755,16 @@ ExprResult Sema::ActOnMemberAccessExpr(Scope *S, Expr *Base,
const TemplateArgumentListInfo *TemplateArgs;
DecomposeUnqualifiedId(Id, TemplateArgsBuffer,
NameInfo, TemplateArgs);
-
- bool IsArrow = (OpKind == tok::arrow);
+ bool IsArrow = OpKind == tok::arrow;
if (getLangOpts().HLSL && IsArrow)
return ExprError(Diag(OpLoc, diag::err_hlsl_operator_unsupported) << 2);
- NamedDecl *FirstQualifierInScope
- = (!SS.isSet() ? nullptr : FindFirstQualifierInScope(S, SS.getScopeRep()));
-
+ UnresolvedSet<4> UnqualifiedLookups;
+ if (SS.isValid() &&
+ LookupFirstQualifierInScope(S, SS.getScopeRep(), UnqualifiedLookups)) {
+ SS.setUnqualifiedLookups(UnqualifiedLookups.pairs());
+ }
// This is a postfix expression, so get rid of ParenListExprs.
ExprResult Result = MaybeConvertParenListExprToParenExpr(S, Base);
if (Result.isInvalid()) return ExprError();
@@ -1779,8 +1772,8 @@ ExprResult Sema::ActOnMemberAccessExpr(Scope *S, Expr *Base,
ActOnMemberAccessExtraArgs ExtraArgs = {S, Id, ObjCImpDecl};
ExprResult Res = BuildMemberReferenceExpr(
- Base, Base->getType(), OpLoc, IsArrow, SS, TemplateKWLoc,
- FirstQualifierInScope, NameInfo, TemplateArgs, S, &ExtraArgs);
+ Base, Base->getType(), OpLoc, IsArrow, SS, TemplateKWLoc, NameInfo,
+ TemplateArgs, S, &ExtraArgs);
if (!Res.isInvalid() && isa<MemberExpr>(Res.get()))
CheckMemberAccessOfNoDeref(cast<MemberExpr>(Res.get()));
@@ -1924,9 +1917,8 @@ Sema::BuildImplicitMemberExpr(const CXXScopeSpec &SS,
baseExpr = BuildCXXThisExpr(loc, ThisTy, /*IsImplicit=*/true);
}
- return BuildMemberReferenceExpr(
- baseExpr, ThisTy,
- /*OpLoc=*/SourceLocation(),
- /*IsArrow=*/!getLangOpts().HLSL, SS, TemplateKWLoc,
- /*FirstQualifierInScope=*/nullptr, R, TemplateArgs, S);
+ return BuildMemberReferenceExpr(baseExpr, ThisTy,
+ /*OpLoc=*/SourceLocation(),
+ /*IsArrow=*/!getLangOpts().HLSL, SS,
+ TemplateKWLoc, R, TemplateArgs, S);
}
diff --git a/clang/lib/Sema/SemaOverload.cpp b/clang/lib/Sema/SemaOverload.cpp
index c5f56ac62b458..65349c7b6af72 100644
--- a/clang/lib/Sema/SemaOverload.cpp
+++ b/clang/lib/Sema/SemaOverload.cpp
@@ -16031,13 +16031,11 @@ Sema::BuildForRangeBeginEndCall(SourceLocation Loc,
CandidateSet->clear(OverloadCandidateSet::CSK_Normal);
if (!MemberLookup.empty()) {
- ExprResult MemberRef =
- BuildMemberReferenceExpr(Range, Range->getType(), Loc,
- /*IsPtr=*/false, CXXScopeSpec(),
- /*TemplateKWLoc=*/SourceLocation(),
- /*FirstQualifierInScope=*/nullptr,
- MemberLookup,
- /*TemplateArgs=*/nullptr, S);
+ ExprResult MemberRef = BuildMemberReferenceExpr(
+ Range, Range->getType(), Loc,
+ /*IsPtr=*/false, /*SS=*/CXXScopeSpec(),
+ /*TemplateKWLoc=*/SourceLocation(), MemberLookup,
+ /*TemplateArgs=*/nullptr, S);
if (MemberRef.isInvalid()) {
*CallExpr = ExprError();
return FRS_DiagnosticIssued;
diff --git a/clang/lib/Sema/SemaStmtAsm.cpp b/clang/lib/Sema/SemaStmtAsm.cpp
index 32d42f3c3f3bb..da2e99b6bc00c 100644
--- a/clang/lib/Sema/SemaStmtAsm.cpp
+++ b/clang/lib/Sema/SemaStmtAsm.cpp
@@ -900,7 +900,8 @@ Sema::LookupInlineAsmVarDeclField(Expr *E, StringRef Member,
return CXXDependentScopeMemberExpr::Create(
Context, E, T, /*IsArrow=*/false, AsmLoc, NestedNameSpecifierLoc(),
SourceLocation(),
- /*FirstQualifierFoundInScope=*/nullptr, NameInfo, /*TemplateArgs=*/nullptr);
+ /*UnqualifiedLookups=*/std::nullopt, NameInfo,
+ /*TemplateArgs=*/nullptr);
}
const RecordType *RT = T->getAs<RecordType>();
@@ -923,8 +924,9 @@ Sema::LookupInlineAsmVarDeclField(Expr *E, StringRef Member,
// Make an Expr to thread through OpDecl.
ExprResult Result = BuildMemberReferenceExpr(
- E, E->getType(), AsmLoc, /*IsArrow=*/false, CXXScopeSpec(),
- SourceLocation(), nullptr, FieldResult, nullptr, nullptr);
+ E, E->getType(), AsmLoc, /*IsArrow=*/false, /*SS=*/CXXScopeSpec(),
+ /*TemplateKWLoc*/ SourceLocation(), FieldResult,
+ /*TemplateArgs=*/nullptr, /*S=*/nullptr);
return Result;
}
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 87b1f98bbe5ac..91cc9881ceb8b 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -174,15 +174,12 @@ bool Sema::hasAnyAcceptableTemplateNames(LookupResult &R,
return false;
}
-TemplateNameKind Sema::isTemplateName(Scope *S,
- CXXScopeSpec &SS,
- bool hasTemplateKeyword,
- const UnqualifiedId &Name,
- ParsedType ObjectTypePtr,
- bool EnteringContext,
- TemplateTy &TemplateResult,
- bool &MemberOfUnknownSpecialization,
- bool Disambiguation) {
+TemplateNameKind
+Sema::isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword,
+ const UnqualifiedId &Name, ParsedType ObjectTypePtr,
+ bool EnteringContext, TemplateTy &TemplateResult,
+ bool &MemberOfUnknownSpecialization, bool Disambiguation,
+ bool MayBeNNS) {
assert(getLangOpts().CPlusPlus && "No template names in C!");
DeclarationName TName;
@@ -213,8 +210,9 @@ TemplateNameKind Sema::isTemplateName(Scope *S,
if (LookupTemplateName(R, S, SS, ObjectType, EnteringContext,
/*RequiredTemplate=*/SourceLocation(),
&AssumedTemplate,
- /*AllowTypoCorrection=*/!Disambiguation))
+ /*AllowTypoCorrection=*/!Disambiguation, MayBeNNS))
return TNK_Non_template;
+
MemberOfUnknownSpecialization = R.wasNotFoundInCurrentInstantiation();
if (AssumedTemplate != AssumedTemplateKind::None) {
@@ -380,7 +378,7 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
QualType ObjectType, bool EnteringContext,
RequiredTemplateKind RequiredTemplate,
AssumedTemplateKind *ATK,
- bool AllowTypoCorrection) {
+ bool AllowTypoCorrection, bool MayBeNNS) {
if (ATK)
*ATK = AssumedTemplateKind::None;
@@ -389,92 +387,89 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
Found.setTemplateNameLookup(true);
- // Determine where to perform name lookup
- DeclContext *LookupCtx = nullptr;
- bool IsDependent = false;
- if (!ObjectType.isNull()) {
- // This nested-name-specifier occurs in a member access expression, e.g.,
- // x->B::f, and we are looking into the type of the object.
- assert(SS.isEmpty() && "ObjectType and scope specifier cannot coexist");
- LookupCtx = computeDeclContext(ObjectType);
- IsDependent = !LookupCtx && ObjectType->isDependentType();
- assert((IsDependent || !ObjectType->isIncompleteType() ||
- !ObjectType->getAs<TagType>() ||
- ObjectType->castAs<TagType>()->isBeingDefined()) &&
- "Caller should have completed object type");
-
- // Template names cannot appear inside an Objective-C class or object type
- // or a vector type.
- //
- // FIXME: This is wrong. For example:
- //
- // template<typename T> using Vec = T __attribute__((ext_vector_type(4)));
- // Vec<int> vi;
- // vi.Vec<int>::~Vec<int>();
- //
- // ... should be accepted but we will not treat 'Vec' as a template name
- // here. The right thing to do would be to check if the name is a valid
- // vector component name, and look up a template name if not. And similarly
- // for lookups into Objective-C class and object types, where the same
- // problem can arise.
- if (ObjectType->isObjCObjectOrInterfaceType() ||
- ObjectType->isVectorType()) {
- Found.clear();
- return false;
- }
- } else if (SS.isNotEmpty()) {
- // This nested-name-specifier occurs after another nested-name-specifier,
- // so long into the context associated with the prior nested-name-specifier.
- LookupCtx = computeDeclContext(SS, EnteringContext);
- IsDependent = !LookupCtx && isDependentScopeSpecifier(SS);
-
- // The declaration context must be complete.
- if (LookupCtx && RequireCompleteDeclContext(SS, LookupCtx))
- return true;
+ // Template names cannot appear inside an Objective-C class or object type
+ // or a vector type.
+ //
+ // FIXME: This is wrong. For example:
+ //
+ // template<typename T> using Vec = T __attribute__((ext_vector_type(4)));
+ // Vec<int> vi;
+ // vi.Vec<int>::~Vec<int>();
+ //
+ // ... should be accepted but we will not treat 'Vec' as a template name
+ // here. The right thing to do would be to check if the name is a valid
+ // vector component name, and look up a template name if not. And similarly
+ // for lookups into Objective-C class and object types, where the same
+ // problem can arise.
+ if (!ObjectType.isNull() && (ObjectType->isVectorType() ||
+ ObjectType->isObjCObjectOrInterfaceType())) {
+ Found.clear();
+ return false;
}
+ LookupParsedName(Found, S, &SS, ObjectType,
+ /*AllowBuiltinCreation=*/false, EnteringContext);
+
+ // C++ [basic.lookup.qual.general]p3:
+ // [...] Unless otherwise specified, a qualified name undergoes qualified
+ // name lookup in its lookup context from the point where it appears unless
+ // the lookup context either is dependent and is not the current
+ // instantiation or is not a class or class template.
+ //
+ // The lookup context is dependent and either:
+ // - it is not the current instantiation, or
+ // - it is the current instantiation, it has at least one dependent base
+ // class, and qualified lookup found nothing.
+ //
+ // If this is a member-qualified name that is the terminal name of a
+ // nested-name-specifier, we perform unqualified lookup and store the results
+ // so we can replicate the lookup during instantiation. The results of the
+ // unqualified loookup are *not* used to determine whether '<' is interpreted
+ // as the delimiter of a template-argument-list.
+ //
+ // For example:
+ //
+ // template<typename T>
+ // struct A {
+ // int x;
+ // };
+ //
+ // template<typename T>
+ // using B = A<T>;
+ //
+ // template<typename T>
+ // void f(A<T> a, A<int> b) {
+ // a.B<T>::x; // error: missing 'template' before 'B'
+ // b.B<int>::x; // ok, lookup context is not dependent
+ // }
+ if (Found.wasNotFoundInCurrentInstantiation())
+ return false;
+
bool ObjectTypeSearchedInScope = false;
- bool AllowFunctionTemplatesInLookup = true;
- if (LookupCtx) {
- // Perform "qualified" name lookup into the declaration context we
- // computed, which is either the type of the base of a member access
- // expression or the declaration context associated with a prior
- // nested-name-specifier.
- LookupQualifiedName(Found, LookupCtx);
-
- // FIXME: The C++ standard does not clearly specify what happens in the
- // case where the object type is dependent, and implementations vary. In
- // Clang, we treat a name after a . or -> as a template-name if lookup
- // finds a non-dependent member or member of the current instantiation that
- // is a type template, or finds no such members and lookup in the context
- // of the postfix-expression finds a type template. In the latter case, the
- // name is nonetheless dependent, and we may resolve it to a member of an
- // unknown specialization when we come to instantiate the template.
- IsDependent |= Found.wasNotFoundInCurrentInstantiation();
- }
-
- if (SS.isEmpty() && (ObjectType.isNull() || Found.empty())) {
- // C++ [basic.lookup.classref]p1:
- // In a class member access expression (5.2.5), if the . or -> token is
- // immediately followed by an identifier followed by a <, the
- // identifier must be looked up to determine whether the < is the
- // beginning of a template argument list (14.2) or a less-than operator.
- // The identifier is first looked up in the class of the object
- // expression. If the identifier is not found, it is then looked up in
- // the context of the entire postfix-expression and shall name a class
- // template.
- if (S)
- LookupName(Found, S);
- if (!ObjectType.isNull()) {
- // FIXME: We should filter out all non-type templates here, particularly
- // variable templates and concepts. But the exclusion of alias templates
- // and template template parameters is a wording defect.
- AllowFunctionTemplatesInLookup = false;
- ObjectTypeSearchedInScope = true;
+ // C++ [basic.lookup.qual.general]p2:
+ // A member-qualified name is the (unique) component name, if any, of
+ // - an unqualified-id or
+ // - a nested-name-specifier of the form type-name :: or namespace-name ::
+ // in the id-expression of a class member access expression.
+ //
+ // C++ [basic.lookup.qual.general]p3:
+ // [...] If nothing is found by qualified lookup for a member-qualified
+ // name that is the terminal name of a nested-name-specifier and is not
+ // dependent, it undergoes unqualified lookup.
+ //
+ // In 'x.A::B::y', 'A' will undergo unqualified lookup if qualified lookup
+ // in the type of 'x' finds nothing. If the lookup context is dependent,
+ // we perform the unqualified lookup in the template definition context
+ // and store the results so we can replicate the lookup during instantiation.
+ if (MayBeNNS && Found.empty() && !ObjectType.isNull()) {
+ if (S) {
+ LookupName(Found, S);
+ } else if (!SS.getUnqualifiedLookups().empty()) {
+ Found.addAllDecls(SS.getUnqualifiedLookups());
+ Found.resolveKind();
}
-
- IsDependent |= Found.wasNotFoundInCurrentInstantiation();
+ ObjectTypeSearchedInScope = true;
}
if (Found.isAmbiguous())
@@ -494,7 +489,7 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
getLangOpts().CPlusPlus20 && llvm::all_of(Found, [](NamedDecl *ND) {
return isa<FunctionDecl>(ND->getUnderlyingDecl());
});
- if (AllFunctions || (Found.empty() && !IsDependent)) {
+ if (AllFunctions || Found.empty()) {
// If lookup found any functions, or if this is a name that can only be
// used for a function, then strongly assume this is a function
// template-id.
@@ -506,11 +501,15 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
}
}
- if (Found.empty() && !IsDependent && AllowTypoCorrection) {
+ if (Found.empty() && AllowTypoCorrection) {
// If we did not find any names, and this is not a disambiguation, attempt
// to correct any typos.
DeclarationName Name = Found.getLookupName();
Found.clear();
+ DeclContext *LookupCtx =
+ SS.isSet()
+ ? computeDeclContext(SS, EnteringContext)
+ : (!ObjectType.isNull() ? computeDeclContext(ObjectType) : nullptr);
// Simple filter callback that, for keywords, only accepts the C++ *_cast
DefaultFilterCCC FilterCCC{};
FilterCCC.WantTypeSpecifiers = false;
@@ -543,13 +542,8 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
NamedDecl *ExampleLookupResult =
Found.empty() ? nullptr : Found.getRepresentativeDecl();
- FilterAcceptableTemplateNames(Found, AllowFunctionTemplatesInLookup);
+ FilterAcceptableTemplateNames(Found);
if (Found.empty()) {
- if (IsDependent) {
- Found.setNotFoundInCurrentInstantiation();
- return false;
- }
-
// If a 'template' keyword was used, a lookup that finds only non-template
// names is an error.
if (ExampleLookupResult && RequiredTemplate) {
@@ -741,7 +735,7 @@ Sema::ActOnDependentIdExpression(const CXXScopeSpec &SS,
/*IsArrow=*/!Context.getLangOpts().HLSL,
/*OperatorLoc=*/SourceLocation(),
/*QualifierLoc=*/NestedNameSpecifierLoc(), TemplateKWLoc,
- /*FirstQualifierFoundInScope=*/nullptr, NameInfo, TemplateArgs);
+ /*UnqualifiedLookups=*/std::nullopt, NameInfo, TemplateArgs);
}
return BuildDependentDeclRefExpr(SS, TemplateKWLoc, NameInfo, TemplateArgs);
}
@@ -4480,14 +4474,10 @@ ExprResult Sema::BuildQualifiedTemplateIdExpr(
return BuildTemplateIdExpr(SS, TemplateKWLoc, R, /*ADL=*/false, TemplateArgs);
}
-TemplateNameKind Sema::ActOnTemplateName(Scope *S,
- CXXScopeSpec &SS,
- SourceLocation TemplateKWLoc,
- const UnqualifiedId &Name,
- ParsedType ObjectType,
- bool EnteringContext,
- TemplateTy &Result,
- bool AllowInjectedClassName) {
+TemplateNameKind Sema::ActOnTemplateName(
+ Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
+ const UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext,
+ TemplateTy &Result, bool AllowInjectedClassName, bool MayBeNNS) {
if (TemplateKWLoc.isValid() && S && !S->getTemplateParamParent())
Diag(TemplateKWLoc,
getLangOpts().CPlusPlus11 ?
@@ -4522,9 +4512,10 @@ TemplateNameKind Sema::ActOnTemplateName(Scope *S,
// "template" keyword is now permitted). We follow the C++0x
// rules, even in C++03 mode with a warning, retroactively applying the DR.
bool MemberOfUnknownSpecialization;
- TemplateNameKind TNK = isTemplateName(S, SS, TemplateKWLoc.isValid(), Name,
- ObjectType, EnteringContext, Result,
- MemberOfUnknownSpecialization);
+ TemplateNameKind TNK =
+ isTemplateName(S, SS, TemplateKWLoc.isValid(), Name, ObjectType,
+ EnteringContext, Result, MemberOfUnknownSpecialization,
+ /*Disambiguation=*/false, MayBeNNS);
if (TNK != TNK_Non_template) {
// We resolved this to a (non-dependent) template name. Return it.
auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(LookupCtx);
@@ -4563,7 +4554,8 @@ TemplateNameKind Sema::ActOnTemplateName(Scope *S,
? RequiredTemplateKind(TemplateKWLoc)
: TemplateNameIsRequired;
if (!LookupTemplateName(R, S, SS, ObjectType.get(), EnteringContext, RTK,
- /*ATK=*/nullptr, /*AllowTypoCorrection=*/false) &&
+ /*ATK=*/nullptr, /*AllowTypoCorrection=*/false,
+ MayBeNNS) &&
!R.isAmbiguous()) {
if (LookupCtx)
Diag(Name.getBeginLoc(), diag::err_no_member)
diff --git a/clang/lib/Sema/SemaTemplateInstantiate.cpp b/clang/lib/Sema/SemaTemplateInstantiate.cpp
index 8995d461362d7..d989bedb78877 100644
--- a/clang/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiate.cpp
@@ -1515,12 +1515,11 @@ namespace {
NestedNameSpecifierLoc QualifierLoc,
QualType T);
- TemplateName
- TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
- SourceLocation NameLoc,
- QualType ObjectType = QualType(),
- NamedDecl *FirstQualifierInScope = nullptr,
- bool AllowInjectedClassName = false);
+ TemplateName TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
+ SourceLocation NameLoc,
+ QualType ObjectType = QualType(),
+ bool AllowInjectedClassName = false,
+ bool MayBeNNS = false);
const CXXAssumeAttr *TransformCXXAssumeAttr(const CXXAssumeAttr *AA);
const LoopHintAttr *TransformLoopHintAttr(const LoopHintAttr *LH);
@@ -1952,8 +1951,7 @@ TemplateInstantiator::RebuildElaboratedType(SourceLocation KeywordLoc,
TemplateName TemplateInstantiator::TransformTemplateName(
CXXScopeSpec &SS, TemplateName Name, SourceLocation NameLoc,
- QualType ObjectType, NamedDecl *FirstQualifierInScope,
- bool AllowInjectedClassName) {
+ QualType ObjectType, bool AllowInjectedClassName, bool MayBeNNS) {
if (TemplateTemplateParmDecl *TTP
= dyn_cast_or_null<TemplateTemplateParmDecl>(Name.getAsTemplateDecl())) {
if (TTP->getDepth() < TemplateArgs.getNumLevels()) {
@@ -2025,8 +2023,7 @@ TemplateName TemplateInstantiator::TransformTemplateName(
}
return inherited::TransformTemplateName(SS, Name, NameLoc, ObjectType,
- FirstQualifierInScope,
- AllowInjectedClassName);
+ AllowInjectedClassName, MayBeNNS);
}
ExprResult
diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 4d68ebf0cc452..ac51b74731815 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -541,10 +541,9 @@ class TreeTransform {
/// By default, transforms all of the types and declarations within the
/// nested-name-specifier. Subclasses may override this function to provide
/// alternate behavior.
- NestedNameSpecifierLoc
- TransformNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
- QualType ObjectType = QualType(),
- NamedDecl *FirstQualifierInScope = nullptr);
+ NestedNameSpecifierLoc TransformNestedNameSpecifierLoc(
+ NestedNameSpecifierLoc NNS, QualType ObjectType = QualType(),
+ ArrayRef<DeclAccessPair> UnqualifiedLookups = std::nullopt);
/// Transform the given declaration name.
///
@@ -585,12 +584,11 @@ class TreeTransform {
/// By default, transforms the template name by transforming the declarations
/// and nested-name-specifiers that occur within the template name.
/// Subclasses may override this function to provide alternate behavior.
- TemplateName
- TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
- SourceLocation NameLoc,
- QualType ObjectType = QualType(),
- NamedDecl *FirstQualifierInScope = nullptr,
- bool AllowInjectedClassName = false);
+ TemplateName TransformTemplateName(CXXScopeSpec &SS, TemplateName Name,
+ SourceLocation NameLoc,
+ QualType ObjectType = QualType(),
+ bool AllowInjectedClassName = false,
+ bool MayBeNNS = false);
/// Transform the given template argument.
///
@@ -1140,8 +1138,8 @@ class TreeTransform {
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
TemplateName InstName = getDerived().RebuildTemplateName(
- SS, TemplateKWLoc, *Name, NameLoc, QualType(), nullptr,
- AllowInjectedClassName);
+ SS, TemplateKWLoc, *Name, NameLoc, QualType(), AllowInjectedClassName,
+ /*MayBeNNS=*/false);
if (InstName.isNull())
return QualType();
@@ -1312,8 +1310,7 @@ class TreeTransform {
SourceLocation TemplateKWLoc,
const IdentifierInfo &Name,
SourceLocation NameLoc, QualType ObjectType,
- NamedDecl *FirstQualifierInScope,
- bool AllowInjectedClassName);
+ bool AllowInjectedClassName, bool MayBeNNS);
/// Build a new template name given a nested name specifier and the
/// overloaded operator name that is referred to as a template.
@@ -2849,15 +2846,14 @@ class TreeTransform {
///
/// By default, performs semantic analysis to build the new expression.
/// Subclasses may override this routine to provide different behavior.
- ExprResult RebuildMemberExpr(Expr *Base, SourceLocation OpLoc,
- bool isArrow,
- NestedNameSpecifierLoc QualifierLoc,
- SourceLocation TemplateKWLoc,
- const DeclarationNameInfo &MemberNameInfo,
- ValueDecl *Member,
- NamedDecl *FoundDecl,
- const TemplateArgumentListInfo *ExplicitTemplateArgs,
- NamedDecl *FirstQualifierInScope) {
+ ExprResult
+ RebuildMemberExpr(Expr *Base, SourceLocation OpLoc, bool isArrow,
+ NestedNameSpecifierLoc QualifierLoc,
+ SourceLocation TemplateKWLoc,
+ const DeclarationNameInfo &MemberNameInfo,
+ ValueDecl *Member, NamedDecl *FoundDecl,
+ const TemplateArgumentListInfo *ExplicitTemplateArgs,
+ ArrayRef<DeclAccessPair> UnqualifiedLookups) {
ExprResult BaseResult = getSema().PerformMemberExprBaseConversion(Base,
isArrow);
if (!Member->getDeclName()) {
@@ -2894,6 +2890,7 @@ class TreeTransform {
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
+ SS.setUnqualifiedLookups(UnqualifiedLookups);
Base = BaseResult.get();
if (Base->containsErrors())
@@ -2926,10 +2923,9 @@ class TreeTransform {
}
return getSema().BuildMemberReferenceExpr(Base, BaseType, OpLoc, isArrow,
- SS, TemplateKWLoc,
- FirstQualifierInScope,
- R, ExplicitTemplateArgs,
- /*S*/nullptr);
+ SS, TemplateKWLoc, R,
+ ExplicitTemplateArgs,
+ /*S=*/nullptr);
}
/// Build a new binary operator expression.
@@ -3002,10 +2998,9 @@ class TreeTransform {
CXXScopeSpec SS;
DeclarationNameInfo NameInfo(&Accessor, AccessorLoc);
return getSema().BuildMemberReferenceExpr(
- Base, Base->getType(), OpLoc, IsArrow, SS, SourceLocation(),
- /*FirstQualifierInScope*/ nullptr, NameInfo,
- /* TemplateArgs */ nullptr,
- /*S*/ nullptr);
+ Base, Base->getType(), OpLoc, IsArrow, SS,
+ /*TemplateKWLoc=*/SourceLocation(), NameInfo,
+ /*TemplateArgs=*/nullptr, /*S=*/nullptr);
}
/// Build a new initializer list expression.
@@ -3573,46 +3568,37 @@ class TreeTransform {
///
/// By default, performs semantic analysis to build the new expression.
/// Subclasses may override this routine to provide different behavior.
- ExprResult RebuildCXXDependentScopeMemberExpr(Expr *BaseE,
- QualType BaseType,
- bool IsArrow,
- SourceLocation OperatorLoc,
- NestedNameSpecifierLoc QualifierLoc,
- SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope,
- const DeclarationNameInfo &MemberNameInfo,
- const TemplateArgumentListInfo *TemplateArgs) {
+ ExprResult RebuildCXXDependentScopeMemberExpr(
+ Expr *BaseE, QualType BaseType, bool IsArrow, SourceLocation OperatorLoc,
+ NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
+ ArrayRef<DeclAccessPair> UnqualifiedLookups,
+ const DeclarationNameInfo &MemberNameInfo,
+ const TemplateArgumentListInfo *TemplateArgs) {
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
+ SS.setUnqualifiedLookups(UnqualifiedLookups);
- return SemaRef.BuildMemberReferenceExpr(BaseE, BaseType,
- OperatorLoc, IsArrow,
- SS, TemplateKWLoc,
- FirstQualifierInScope,
- MemberNameInfo,
- TemplateArgs, /*S*/nullptr);
+ return SemaRef.BuildMemberReferenceExpr(
+ BaseE, BaseType, OperatorLoc, IsArrow, SS, TemplateKWLoc,
+ MemberNameInfo, TemplateArgs, /*S=*/nullptr);
}
/// Build a new member reference expression.
///
/// By default, performs semantic analysis to build the new expression.
/// Subclasses may override this routine to provide different behavior.
- ExprResult RebuildUnresolvedMemberExpr(Expr *BaseE, QualType BaseType,
- SourceLocation OperatorLoc,
- bool IsArrow,
- NestedNameSpecifierLoc QualifierLoc,
- SourceLocation TemplateKWLoc,
- NamedDecl *FirstQualifierInScope,
- LookupResult &R,
- const TemplateArgumentListInfo *TemplateArgs) {
+ ExprResult RebuildUnresolvedMemberExpr(
+ Expr *BaseE, QualType BaseType, SourceLocation OperatorLoc, bool IsArrow,
+ NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
+ ArrayRef<DeclAccessPair> UnqualifiedLookups, LookupResult &R,
+ const TemplateArgumentListInfo *TemplateArgs) {
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
+ SS.setUnqualifiedLookups(UnqualifiedLookups);
- return SemaRef.BuildMemberReferenceExpr(BaseE, BaseType,
- OperatorLoc, IsArrow,
- SS, TemplateKWLoc,
- FirstQualifierInScope,
- R, TemplateArgs, /*S*/nullptr);
+ return SemaRef.BuildMemberReferenceExpr(BaseE, BaseType, OperatorLoc,
+ IsArrow, SS, TemplateKWLoc, R,
+ TemplateArgs, /*S=*/nullptr);
}
/// Build a new noexcept expression.
@@ -3831,10 +3817,8 @@ class TreeTransform {
DeclarationNameInfo NameInfo(Ivar->getDeclName(), IvarLoc);
ExprResult Result = getSema().BuildMemberReferenceExpr(
BaseArg, BaseArg->getType(),
- /*FIXME:*/ IvarLoc, IsArrow, SS, SourceLocation(),
- /*FirstQualifierInScope=*/nullptr, NameInfo,
- /*TemplateArgs=*/nullptr,
- /*S=*/nullptr);
+ /*FIXME:*/ IvarLoc, IsArrow, SS, /*TemplateKWLoc=*/SourceLocation(),
+ NameInfo, /*TemplateArgs=*/nullptr, /*S=*/nullptr);
if (IsFreeIvar && Result.isUsable())
cast<ObjCIvarRefExpr>(Result.get())->setIsFreeIvar(IsFreeIvar);
return Result;
@@ -3849,14 +3833,12 @@ class TreeTransform {
SourceLocation PropertyLoc) {
CXXScopeSpec SS;
DeclarationNameInfo NameInfo(Property->getDeclName(), PropertyLoc);
- return getSema().BuildMemberReferenceExpr(BaseArg, BaseArg->getType(),
- /*FIXME:*/PropertyLoc,
- /*IsArrow=*/false,
- SS, SourceLocation(),
- /*FirstQualifierInScope=*/nullptr,
- NameInfo,
- /*TemplateArgs=*/nullptr,
- /*S=*/nullptr);
+ return getSema().BuildMemberReferenceExpr(
+ BaseArg, BaseArg->getType(),
+ /*FIXME:*/ PropertyLoc,
+ /*IsArrow=*/false, SS, /*TemplateKWLoc=*/SourceLocation(), NameInfo,
+ /*TemplateArgs=*/nullptr,
+ /*S=*/nullptr);
}
/// Build a new Objective-C property reference expression.
@@ -3883,13 +3865,11 @@ class TreeTransform {
SourceLocation OpLoc, bool IsArrow) {
CXXScopeSpec SS;
DeclarationNameInfo NameInfo(&getSema().Context.Idents.get("isa"), IsaLoc);
- return getSema().BuildMemberReferenceExpr(BaseArg, BaseArg->getType(),
- OpLoc, IsArrow,
- SS, SourceLocation(),
- /*FirstQualifierInScope=*/nullptr,
- NameInfo,
- /*TemplateArgs=*/nullptr,
- /*S=*/nullptr);
+ return getSema().BuildMemberReferenceExpr(
+ BaseArg, BaseArg->getType(), OpLoc, IsArrow, SS,
+ /*TemplateKWLoc=*/SourceLocation(), NameInfo,
+ /*TemplateArgs=*/nullptr,
+ /*S=*/nullptr);
}
/// Build a new shuffle vector expression.
@@ -4054,18 +4034,14 @@ class TreeTransform {
}
private:
- TypeLoc TransformTypeInObjectScope(TypeLoc TL,
- QualType ObjectType,
- NamedDecl *FirstQualifierInScope,
+ TypeLoc TransformTypeInObjectScope(TypeLoc TL, QualType ObjectType,
CXXScopeSpec &SS);
TypeSourceInfo *TransformTypeInObjectScope(TypeSourceInfo *TSInfo,
QualType ObjectType,
- NamedDecl *FirstQualifierInScope,
CXXScopeSpec &SS);
TypeSourceInfo *TransformTSIInObjectScope(TypeLoc TL, QualType ObjectType,
- NamedDecl *FirstQualifierInScope,
CXXScopeSpec &SS);
QualType TransformDependentNameType(TypeLocBuilder &TLB,
@@ -4384,7 +4360,7 @@ Sema::ConditionResult TreeTransform<Derived>::TransformCondition(
template <typename Derived>
NestedNameSpecifierLoc TreeTransform<Derived>::TransformNestedNameSpecifierLoc(
NestedNameSpecifierLoc NNS, QualType ObjectType,
- NamedDecl *FirstQualifierInScope) {
+ ArrayRef<DeclAccessPair> UnqualifiedLookups) {
SmallVector<NestedNameSpecifierLoc, 4> Qualifiers;
auto insertNNS = [&Qualifiers](NestedNameSpecifierLoc NNS) {
@@ -4395,6 +4371,8 @@ NestedNameSpecifierLoc TreeTransform<Derived>::TransformNestedNameSpecifierLoc(
insertNNS(NNS);
CXXScopeSpec SS;
+ SS.setUnqualifiedLookups(UnqualifiedLookups);
+
while (!Qualifiers.empty()) {
NestedNameSpecifierLoc Q = Qualifiers.pop_back_val();
NestedNameSpecifier *QNNS = Q.getNestedNameSpecifier();
@@ -4404,8 +4382,9 @@ NestedNameSpecifierLoc TreeTransform<Derived>::TransformNestedNameSpecifierLoc(
Sema::NestedNameSpecInfo IdInfo(QNNS->getAsIdentifier(),
Q.getLocalBeginLoc(), Q.getLocalEndLoc(),
ObjectType);
- if (SemaRef.BuildCXXNestedNameSpecifier(/*Scope=*/nullptr, IdInfo, false,
- SS, FirstQualifierInScope, false))
+ if (SemaRef.BuildCXXNestedNameSpecifier(/*Scope=*/nullptr, IdInfo,
+ /*EnteringContext=*/false, SS,
+ /*ErrorRecoveryLookup=*/false))
return NestedNameSpecifierLoc();
break;
}
@@ -4443,8 +4422,7 @@ NestedNameSpecifierLoc TreeTransform<Derived>::TransformNestedNameSpecifierLoc(
case NestedNameSpecifier::TypeSpecWithTemplate:
case NestedNameSpecifier::TypeSpec: {
- TypeLoc TL = TransformTypeInObjectScope(Q.getTypeLoc(), ObjectType,
- FirstQualifierInScope, SS);
+ TypeLoc TL = TransformTypeInObjectScope(Q.getTypeLoc(), ObjectType, SS);
if (!TL)
return NestedNameSpecifierLoc();
@@ -4477,7 +4455,7 @@ NestedNameSpecifierLoc TreeTransform<Derived>::TransformNestedNameSpecifierLoc(
}
// The qualifier-in-scope and object type only apply to the leftmost entity.
- FirstQualifierInScope = nullptr;
+ SS.setUnqualifiedLookups(std::nullopt);
ObjectType = QualType();
}
@@ -4560,14 +4538,10 @@ ::TransformDeclarationNameInfo(const DeclarationNameInfo &NameInfo) {
llvm_unreachable("Unknown name kind.");
}
-template<typename Derived>
-TemplateName
-TreeTransform<Derived>::TransformTemplateName(CXXScopeSpec &SS,
- TemplateName Name,
- SourceLocation NameLoc,
- QualType ObjectType,
- NamedDecl *FirstQualifierInScope,
- bool AllowInjectedClassName) {
+template <typename Derived>
+TemplateName TreeTransform<Derived>::TransformTemplateName(
+ CXXScopeSpec &SS, TemplateName Name, SourceLocation NameLoc,
+ QualType ObjectType, bool AllowInjectedClassName, bool MayBeNNS) {
if (QualifiedTemplateName *QTN = Name.getAsQualifiedTemplateName()) {
TemplateDecl *Template = QTN->getUnderlyingTemplate().getAsTemplateDecl();
assert(Template && "qualified template name must refer to a template");
@@ -4591,7 +4565,7 @@ TreeTransform<Derived>::TransformTemplateName(CXXScopeSpec &SS,
if (SS.getScopeRep()) {
// These apply to the scope specifier, not the template.
ObjectType = QualType();
- FirstQualifierInScope = nullptr;
+ SS.setUnqualifiedLookups(std::nullopt);
}
if (!getDerived().AlwaysRebuild() &&
@@ -4603,13 +4577,9 @@ TreeTransform<Derived>::TransformTemplateName(CXXScopeSpec &SS,
SourceLocation TemplateKWLoc = NameLoc;
if (DTN->isIdentifier()) {
- return getDerived().RebuildTemplateName(SS,
- TemplateKWLoc,
- *DTN->getIdentifier(),
- NameLoc,
- ObjectType,
- FirstQualifierInScope,
- AllowInjectedClassName);
+ return getDerived().RebuildTemplateName(
+ SS, TemplateKWLoc, *DTN->getIdentifier(), NameLoc, ObjectType,
+ AllowInjectedClassName, MayBeNNS);
}
return getDerived().RebuildTemplateName(SS, TemplateKWLoc,
@@ -5153,39 +5123,31 @@ QualType TreeTransform<Derived>::RebuildQualifiedType(QualType T,
return SemaRef.BuildQualifiedType(T, Loc, Quals);
}
-template<typename Derived>
-TypeLoc
-TreeTransform<Derived>::TransformTypeInObjectScope(TypeLoc TL,
- QualType ObjectType,
- NamedDecl *UnqualLookup,
- CXXScopeSpec &SS) {
+template <typename Derived>
+TypeLoc TreeTransform<Derived>::TransformTypeInObjectScope(TypeLoc TL,
+ QualType ObjectType,
+ CXXScopeSpec &SS) {
if (getDerived().AlreadyTransformed(TL.getType()))
return TL;
- TypeSourceInfo *TSI =
- TransformTSIInObjectScope(TL, ObjectType, UnqualLookup, SS);
+ TypeSourceInfo *TSI = TransformTSIInObjectScope(TL, ObjectType, SS);
if (TSI)
return TSI->getTypeLoc();
return TypeLoc();
}
-template<typename Derived>
-TypeSourceInfo *
-TreeTransform<Derived>::TransformTypeInObjectScope(TypeSourceInfo *TSInfo,
- QualType ObjectType,
- NamedDecl *UnqualLookup,
- CXXScopeSpec &SS) {
+template <typename Derived>
+TypeSourceInfo *TreeTransform<Derived>::TransformTypeInObjectScope(
+ TypeSourceInfo *TSInfo, QualType ObjectType, CXXScopeSpec &SS) {
if (getDerived().AlreadyTransformed(TSInfo->getType()))
return TSInfo;
- return TransformTSIInObjectScope(TSInfo->getTypeLoc(), ObjectType,
- UnqualLookup, SS);
+ return TransformTSIInObjectScope(TSInfo->getTypeLoc(), ObjectType, SS);
}
template <typename Derived>
TypeSourceInfo *TreeTransform<Derived>::TransformTSIInObjectScope(
- TypeLoc TL, QualType ObjectType, NamedDecl *UnqualLookup,
- CXXScopeSpec &SS) {
+ TypeLoc TL, QualType ObjectType, CXXScopeSpec &SS) {
QualType T = TL.getType();
assert(!getDerived().AlreadyTransformed(T));
@@ -5198,7 +5160,7 @@ TypeSourceInfo *TreeTransform<Derived>::TransformTSIInObjectScope(
TemplateName Template = getDerived().TransformTemplateName(
SS, SpecTL.getTypePtr()->getTemplateName(), SpecTL.getTemplateNameLoc(),
- ObjectType, UnqualLookup, /*AllowInjectedClassName*/true);
+ ObjectType, /*AllowInjectedClassName=*/true, /*MayBeNNS=*/true);
if (Template.isNull())
return nullptr;
@@ -5208,13 +5170,11 @@ TypeSourceInfo *TreeTransform<Derived>::TransformTSIInObjectScope(
DependentTemplateSpecializationTypeLoc SpecTL =
TL.castAs<DependentTemplateSpecializationTypeLoc>();
- TemplateName Template
- = getDerived().RebuildTemplateName(SS,
- SpecTL.getTemplateKeywordLoc(),
- *SpecTL.getTypePtr()->getIdentifier(),
- SpecTL.getTemplateNameLoc(),
- ObjectType, UnqualLookup,
- /*AllowInjectedClassName*/true);
+ TemplateName Template = getDerived().RebuildTemplateName(
+ SS, SpecTL.getTemplateKeywordLoc(),
+ *SpecTL.getTypePtr()->getIdentifier(), SpecTL.getTemplateNameLoc(),
+ ObjectType,
+ /*AllowInjectedClassName=*/true, /*MayBeNNS=*/true);
if (Template.isNull())
return nullptr;
@@ -12384,7 +12344,8 @@ TreeTransform<Derived>::TransformMemberExpr(MemberExpr *E) {
// first-qualifier-in-scope here, just in case we had a dependent
// base (and therefore couldn't do the check) and a
// nested-name-qualifier (and therefore could do the lookup).
- NamedDecl *FirstQualifierInScope = nullptr;
+ ArrayRef<DeclAccessPair> UnqualifiedLookups;
+
DeclarationNameInfo MemberNameInfo = E->getMemberNameInfo();
if (MemberNameInfo.getName()) {
MemberNameInfo = getDerived().TransformDeclarationNameInfo(MemberNameInfo);
@@ -12392,16 +12353,11 @@ TreeTransform<Derived>::TransformMemberExpr(MemberExpr *E) {
return ExprError();
}
- return getDerived().RebuildMemberExpr(Base.get(), FakeOperatorLoc,
- E->isArrow(),
- QualifierLoc,
- TemplateKWLoc,
- MemberNameInfo,
- Member,
- FoundDecl,
- (E->hasExplicitTemplateArgs()
- ? &TransArgs : nullptr),
- FirstQualifierInScope);
+ return getDerived().RebuildMemberExpr(
+ Base.get(), FakeOperatorLoc, E->isArrow(), QualifierLoc, TemplateKWLoc,
+ MemberNameInfo, Member, FoundDecl,
+ (E->hasExplicitTemplateArgs() ? &TransArgs : nullptr),
+ UnqualifiedLookups);
}
template<typename Derived>
@@ -13528,9 +13484,8 @@ TreeTransform<Derived>::TransformCXXPseudoDestructorExpr(
PseudoDestructorTypeStorage Destroyed;
if (E->getDestroyedTypeInfo()) {
- TypeSourceInfo *DestroyedTypeInfo
- = getDerived().TransformTypeInObjectScope(E->getDestroyedTypeInfo(),
- ObjectType, nullptr, SS);
+ TypeSourceInfo *DestroyedTypeInfo = getDerived().TransformTypeInObjectScope(
+ E->getDestroyedTypeInfo(), ObjectType, SS);
if (!DestroyedTypeInfo)
return ExprError();
Destroyed = DestroyedTypeInfo;
@@ -13556,7 +13511,7 @@ TreeTransform<Derived>::TransformCXXPseudoDestructorExpr(
if (E->getScopeTypeInfo()) {
CXXScopeSpec EmptySS;
ScopeTypeInfo = getDerived().TransformTypeInObjectScope(
- E->getScopeTypeInfo(), ObjectType, nullptr, EmptySS);
+ E->getScopeTypeInfo(), ObjectType, EmptySS);
if (!ScopeTypeInfo)
return ExprError();
}
@@ -14817,19 +14772,17 @@ TreeTransform<Derived>::TransformCXXDependentScopeMemberExpr(
ObjectType = BaseType->castAs<PointerType>()->getPointeeType();
}
- // Transform the first part of the nested-name-specifier that qualifies
- // the member name.
- NamedDecl *FirstQualifierInScope
- = getDerived().TransformFirstQualifierInScope(
- E->getFirstQualifierFoundInScope(),
- E->getQualifierLoc().getBeginLoc());
+ UnresolvedSet<4> UnqualifiedLookups;
+ for (auto D : E->unqualified_lookups()) {
+ if (NamedDecl *InstD = getDerived().TransformFirstQualifierInScope(
+ D.getDecl(), E->getQualifierLoc().getBeginLoc()))
+ UnqualifiedLookups.addDecl(InstD);
+ }
NestedNameSpecifierLoc QualifierLoc;
if (E->getQualifier()) {
- QualifierLoc
- = getDerived().TransformNestedNameSpecifierLoc(E->getQualifierLoc(),
- ObjectType,
- FirstQualifierInScope);
+ QualifierLoc = getDerived().TransformNestedNameSpecifierLoc(
+ E->getQualifierLoc(), ObjectType, UnqualifiedLookups.pairs());
if (!QualifierLoc)
return ExprError();
}
@@ -14848,23 +14801,16 @@ TreeTransform<Derived>::TransformCXXDependentScopeMemberExpr(
if (!E->hasExplicitTemplateArgs()) {
// This is a reference to a member without an explicitly-specified
// template argument list. Optimize for this common case.
- if (!getDerived().AlwaysRebuild() &&
- Base.get() == OldBase &&
- BaseType == E->getBaseType() &&
- QualifierLoc == E->getQualifierLoc() &&
+ if (!getDerived().AlwaysRebuild() && Base.get() == OldBase &&
+ BaseType == E->getBaseType() && QualifierLoc == E->getQualifierLoc() &&
NameInfo.getName() == E->getMember() &&
- FirstQualifierInScope == E->getFirstQualifierFoundInScope())
+ UnqualifiedLookups.pairs() == E->unqualified_lookups())
return E;
- return getDerived().RebuildCXXDependentScopeMemberExpr(Base.get(),
- BaseType,
- E->isArrow(),
- E->getOperatorLoc(),
- QualifierLoc,
- TemplateKWLoc,
- FirstQualifierInScope,
- NameInfo,
- /*TemplateArgs*/nullptr);
+ return getDerived().RebuildCXXDependentScopeMemberExpr(
+ Base.get(), BaseType, E->isArrow(), E->getOperatorLoc(), QualifierLoc,
+ TemplateKWLoc, UnqualifiedLookups.pairs(), NameInfo,
+ /*TemplateArgs*/ nullptr);
}
TemplateArgumentListInfo TransArgs(E->getLAngleLoc(), E->getRAngleLoc());
@@ -14873,15 +14819,9 @@ TreeTransform<Derived>::TransformCXXDependentScopeMemberExpr(
TransArgs))
return ExprError();
- return getDerived().RebuildCXXDependentScopeMemberExpr(Base.get(),
- BaseType,
- E->isArrow(),
- E->getOperatorLoc(),
- QualifierLoc,
- TemplateKWLoc,
- FirstQualifierInScope,
- NameInfo,
- &TransArgs);
+ return getDerived().RebuildCXXDependentScopeMemberExpr(
+ Base.get(), BaseType, E->isArrow(), E->getOperatorLoc(), QualifierLoc,
+ TemplateKWLoc, UnqualifiedLookups.pairs(), NameInfo, &TransArgs);
}
template <typename Derived>
@@ -14942,11 +14882,11 @@ ExprResult TreeTransform<Derived>::TransformUnresolvedMemberExpr(
// first-qualifier-in-scope here, just in case we had a dependent
// base (and therefore couldn't do the check) and a
// nested-name-qualifier (and therefore could do the lookup).
- NamedDecl *FirstQualifierInScope = nullptr;
+ ArrayRef<DeclAccessPair> UnqualifiedLookups;
return getDerived().RebuildUnresolvedMemberExpr(
Base.get(), BaseType, Old->getOperatorLoc(), Old->isArrow(), QualifierLoc,
- TemplateKWLoc, FirstQualifierInScope, R,
+ TemplateKWLoc, UnqualifiedLookups, R,
(Old->hasExplicitTemplateArgs() ? &TransArgs : nullptr));
}
@@ -16303,22 +16243,18 @@ TreeTransform<Derived>::RebuildTemplateName(CXXScopeSpec &SS,
TemplateName(Template));
}
-template<typename Derived>
-TemplateName
-TreeTransform<Derived>::RebuildTemplateName(CXXScopeSpec &SS,
- SourceLocation TemplateKWLoc,
- const IdentifierInfo &Name,
- SourceLocation NameLoc,
- QualType ObjectType,
- NamedDecl *FirstQualifierInScope,
- bool AllowInjectedClassName) {
+template <typename Derived>
+TemplateName TreeTransform<Derived>::RebuildTemplateName(
+ CXXScopeSpec &SS, SourceLocation TemplateKWLoc, const IdentifierInfo &Name,
+ SourceLocation NameLoc, QualType ObjectType, bool AllowInjectedClassName,
+ bool MayBeNNS) {
UnqualifiedId TemplateName;
TemplateName.setIdentifier(&Name, NameLoc);
Sema::TemplateTy Template;
getSema().ActOnTemplateName(/*Scope=*/nullptr, SS, TemplateKWLoc,
TemplateName, ParsedType::make(ObjectType),
/*EnteringContext=*/false, Template,
- AllowInjectedClassName);
+ AllowInjectedClassName, MayBeNNS);
return Template.get();
}
@@ -16466,13 +16402,10 @@ TreeTransform<Derived>::RebuildCXXPseudoDestructorExpr(Expr *Base,
}
SourceLocation TemplateKWLoc; // FIXME: retrieve it from caller.
- return getSema().BuildMemberReferenceExpr(Base, BaseType,
- OperatorLoc, isArrow,
- SS, TemplateKWLoc,
- /*FIXME: FirstQualifier*/ nullptr,
- NameInfo,
- /*TemplateArgs*/ nullptr,
- /*S*/nullptr);
+ return getSema().BuildMemberReferenceExpr(
+ Base, BaseType, OperatorLoc, isArrow, SS, TemplateKWLoc, NameInfo,
+ /*TemplateArgs=*/nullptr,
+ /*S=*/nullptr);
}
template<typename Derived>
diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp b/clang/lib/Serialization/ASTReaderStmt.cpp
index e1cba9e612be3..e7cad990d7352 100644
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -1990,42 +1990,43 @@ void ASTStmtReader::VisitCXXDependentScopeMemberExpr(
CXXDependentScopeMemberExpr *E) {
VisitExpr(E);
- unsigned NumTemplateArgs = Record.readInt();
CurrentUnpackingBits.emplace(Record.readInt());
- bool HasTemplateKWAndArgsInfo = CurrentUnpackingBits->getNextBit();
- bool HasFirstQualifierFoundInScope = CurrentUnpackingBits->getNextBit();
-
- assert((HasTemplateKWAndArgsInfo == E->hasTemplateKWAndArgsInfo()) &&
- "Wrong HasTemplateKWAndArgsInfo!");
- assert(
- (HasFirstQualifierFoundInScope == E->hasFirstQualifierFoundInScope()) &&
- "Wrong HasFirstQualifierFoundInScope!");
-
- if (HasTemplateKWAndArgsInfo)
- ReadTemplateKWAndArgsInfo(
- *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
- E->getTrailingObjects<TemplateArgumentLoc>(), NumTemplateArgs);
-
- assert((NumTemplateArgs == E->getNumTemplateArgs()) &&
- "Wrong NumTemplateArgs!");
+ bool HasQualifier = CurrentUnpackingBits->getNextBit();
+ bool HasTemplateInfo = CurrentUnpackingBits->getNextBit();
+ unsigned NumUnqualifiedLookups = Record.readInt();
+ unsigned NumTemplateArgs = Record.readInt();
+ E->CXXDependentScopeMemberExprBits.HasQualifier = HasQualifier;
+ E->CXXDependentScopeMemberExprBits.NumUnqualifiedLookups =
+ NumUnqualifiedLookups;
+ E->CXXDependentScopeMemberExprBits.HasTemplateKWAndArgsInfo = HasTemplateInfo;
+ E->BaseType = Record.readType();
E->CXXDependentScopeMemberExprBits.IsArrow =
CurrentUnpackingBits->getNextBit();
- E->BaseType = Record.readType();
- E->QualifierLoc = Record.readNestedNameSpecifierLoc();
- // not ImplicitAccess
if (CurrentUnpackingBits->getNextBit())
E->Base = Record.readSubExpr();
else
E->Base = nullptr;
- E->CXXDependentScopeMemberExprBits.OperatorLoc = readSourceLocation();
+ E->OperatorLoc = Record.readSourceLocation();
+ E->MemberNameInfo = Record.readDeclarationNameInfo();
- if (HasFirstQualifierFoundInScope)
- *E->getTrailingObjects<NamedDecl *>() = readDeclAs<NamedDecl>();
+ if (HasQualifier)
+ new (E->getTrailingObjects<NestedNameSpecifierLoc>())
+ NestedNameSpecifierLoc(Record.readNestedNameSpecifierLoc());
- E->MemberNameInfo = Record.readDeclarationNameInfo();
+ for (unsigned I = 0; I != NumUnqualifiedLookups; ++I) {
+ auto *FoundD = Record.readDeclAs<NamedDecl>();
+ auto AS = (AccessSpecifier)Record.readInt();
+ E->getTrailingObjects<DeclAccessPair>()[I] =
+ DeclAccessPair::make(FoundD, AS);
+ }
+
+ if (HasTemplateInfo)
+ ReadTemplateKWAndArgsInfo(
+ *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
+ E->getTrailingObjects<TemplateArgumentLoc>(), NumTemplateArgs);
}
void
@@ -4095,16 +4096,16 @@ Stmt *ASTReader::ReadStmtFromStream(ModuleFile &F) {
break;
case EXPR_CXX_DEPENDENT_SCOPE_MEMBER: {
- unsigned NumTemplateArgs = Record[ASTStmtReader::NumExprFields];
BitsUnpacker DependentScopeMemberBits(
- Record[ASTStmtReader::NumExprFields + 1]);
- bool HasTemplateKWAndArgsInfo = DependentScopeMemberBits.getNextBit();
+ Record[ASTStmtReader::NumExprFields]);
+ bool HasQualifier = DependentScopeMemberBits.getNextBit();
+ bool HasTemplateInfo = DependentScopeMemberBits.getNextBit();
+ unsigned NumUnqualifiedLookups = Record[ASTStmtReader::NumExprFields + 1];
+ unsigned NumTemplateArgs = Record[ASTStmtReader::NumExprFields + 2];
- bool HasFirstQualifierFoundInScope =
- DependentScopeMemberBits.getNextBit();
S = CXXDependentScopeMemberExpr::CreateEmpty(
- Context, HasTemplateKWAndArgsInfo, NumTemplateArgs,
- HasFirstQualifierFoundInScope);
+ Context, HasQualifier, NumUnqualifiedLookups, HasTemplateInfo,
+ NumTemplateArgs);
break;
}
diff --git a/clang/lib/Serialization/ASTWriterStmt.cpp b/clang/lib/Serialization/ASTWriterStmt.cpp
index ec667b58337ff..8abe40772b0ee 100644
--- a/clang/lib/Serialization/ASTWriterStmt.cpp
+++ b/clang/lib/Serialization/ASTWriterStmt.cpp
@@ -1986,34 +1986,41 @@ void ASTStmtWriter::VisitCXXDependentScopeMemberExpr(
CXXDependentScopeMemberExpr *E) {
VisitExpr(E);
- // Don't emit anything here (or if you do you will have to update
- // the corresponding deserialization function).
- Record.push_back(E->getNumTemplateArgs());
- CurrentPackingBits.updateBits();
- CurrentPackingBits.addBit(E->hasTemplateKWAndArgsInfo());
- CurrentPackingBits.addBit(E->hasFirstQualifierFoundInScope());
-
- if (E->hasTemplateKWAndArgsInfo()) {
- const ASTTemplateKWAndArgsInfo &ArgInfo =
- *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
- AddTemplateKWAndArgsInfo(ArgInfo,
- E->getTrailingObjects<TemplateArgumentLoc>());
- }
+ bool HasQualifier = E->hasQualifier();
+ unsigned NumUnqualifiedLookups = E->getNumUnqualifiedLookups();
+ bool HasTemplateInfo = E->hasTemplateKWAndArgsInfo();
+ unsigned NumTemplateArgs = E->getNumTemplateArgs();
- CurrentPackingBits.addBit(E->isArrow());
+ // Write these first for easy access when deserializing, as they affect the
+ // size of the CXXDependentScopeMemberExpr.
+ CurrentPackingBits.updateBits();
+ CurrentPackingBits.addBit(HasQualifier);
+ CurrentPackingBits.addBit(HasTemplateInfo);
+ Record.push_back(NumUnqualifiedLookups);
+ Record.push_back(NumTemplateArgs);
Record.AddTypeRef(E->getBaseType());
- Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
+ CurrentPackingBits.addBit(E->isArrow());
CurrentPackingBits.addBit(!E->isImplicitAccess());
if (!E->isImplicitAccess())
Record.AddStmt(E->getBase());
Record.AddSourceLocation(E->getOperatorLoc());
- if (E->hasFirstQualifierFoundInScope())
- Record.AddDeclRef(E->getFirstQualifierFoundInScope());
-
Record.AddDeclarationNameInfo(E->MemberNameInfo);
+
+ if (HasQualifier)
+ Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
+
+ for (DeclAccessPair D : E->unqualified_lookups()) {
+ Record.AddDeclRef(D.getDecl());
+ Record.push_back(D.getAccess());
+ }
+
+ if (HasTemplateInfo)
+ AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
+ E->getTrailingObjects<TemplateArgumentLoc>());
+
Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
}
diff --git a/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1-cxx11.cpp b/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1-cxx11.cpp
index 1afea99e8895c..11eb67fb4f159 100644
--- a/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1-cxx11.cpp
+++ b/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1-cxx11.cpp
@@ -55,15 +55,19 @@ namespace PR11856 {
template<typename T> T *end(T*);
- class X { };
+ struct X { };
+ struct Y {
+ int end;
+ };
template <typename T>
void Foo2() {
T it1;
- if (it1->end < it1->end) {
- }
+ if (it1->end < it1->end) { }
X *x;
- if (x->end < 7) { // expected-error{{no member named 'end' in 'PR11856::X'}}
- }
+ if (x->end < 7) { } // expected-error{{no member named 'end' in 'PR11856::X'}}
+
+ Y *y;
+ if (y->end < 7) { }
}
}
diff --git a/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp b/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp
index e3599db18350b..5221b883f046c 100644
--- a/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp
+++ b/clang/test/CXX/basic/basic.lookup/basic.lookup.classref/p1.cpp
@@ -86,15 +86,19 @@ namespace PR11856 {
template<typename T> T *end(T*);
- class X { };
+ struct X { };
+ struct Y {
+ int end;
+ };
template <typename T>
void Foo2() {
T it1;
- if (it1->end < it1->end) {
- }
+ if (it1->end < it1->end) { }
X *x;
- if (x->end < 7) { // expected-error{{no member named 'end' in 'PR11856::X'}}
- }
+ if (x->end < 7) { } // expected-error{{no member named 'end' in 'PR11856::X'}}
+
+ Y *y;
+ if (y->end < 7) { }
}
}
diff --git a/clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3-example3.cpp b/clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3-example3.cpp
new file mode 100644
index 0000000000000..423eacd21d441
--- /dev/null
+++ b/clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3-example3.cpp
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -std=c++23 %s -verify
+
+int f();
+
+struct A {
+ int B, C; // expected-note {{declared as a non-template here}}
+ template<int> using D = void;
+ using T = void;
+ void f();
+};
+
+using B = A;
+template<int> using C = A;
+template<int> using D = A;
+template<int> using X = A;
+
+template<class T>
+void g(T *p) {
+ p->X<0>::f(); // expected-error {{no member named 'X' in 'A'}}
+ p->template X<0>::f();
+ p->B::f();
+ p->template C<0>::f(); // expected-error {{'C' following the 'template' keyword does not refer to a template}}
+ p->template D<0>::f(); // expected-error {{type 'template D<0>' (aka 'void') cannot be used prior to '::' because it has no members}}
+ p->T::f(); // expected-error {{'A::T' (aka 'void') is not a class, namespace, or enumeration}}
+}
+
+template void g(A*); // expected-note {{in instantiation of}}
diff --git a/clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3.cpp b/clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3.cpp
new file mode 100644
index 0000000000000..7d843649c3f30
--- /dev/null
+++ b/clang/test/CXX/basic/basic.lookup/basic.lookup.qual/basic.lookup.qual.general/p3.cpp
@@ -0,0 +1,98 @@
+// RUN: %clang_cc1 -std=c++23 -Wno-unused %s -verify
+
+namespace Unambiguous {
+ struct A {
+ int x;
+
+ template<typename T>
+ using C = A;
+ };
+
+ using B = A;
+
+ template<typename T>
+ using D = A;
+
+ using E = void;
+
+ struct F : A {
+ void non_template() {
+ this->x;
+ this->A::x;
+ this->B::x;
+ this->C<int>::x;
+ this->D<int>::x;
+ this->E::x; // expected-error {{'Unambiguous::E' (aka 'void') is not a class, namespace, or enumeration}}
+ }
+ };
+
+ template<typename T>
+ void not_instantiated(T t) {
+ t.x;
+ t.A::x;
+ t.B::x;
+ t.C<int>::x; // expected-warning {{use 'template' keyword to treat 'C' as a dependent template name}}
+ t.template C<int>::x;
+ t.D<int>::x; // expected-warning {{use 'template' keyword to treat 'D' as a dependent template name}}
+ t.template D<int>::x;
+ t.E::x;
+ }
+
+ template<typename T>
+ void instantiated_valid(T t) {
+ t.x;
+ t.A::x;
+ t.B::x;
+ t.template C<int>::x;
+ t.template D<int>::x;
+ t.E::x;
+ }
+
+ template<typename T>
+ void instantiated_invalid(T t) {
+ t.x;
+ t.A::x;
+ t.B::x; // expected-error {{'Unambiguous::Invalid::B' (aka 'void') is not a class, namespace, or enumeration}}
+ t.template C<int>::x;
+ t.template D<int>::x; // expected-error {{'D' following the 'template' keyword does not refer to a template}}
+ t.E::x; // expected-error {{'Unambiguous::E' (aka 'void') is not a class, namespace, or enumeration}}
+ }
+
+ struct Valid : A {
+ using E = A;
+ };
+
+ template void instantiated_valid(Valid);
+
+ struct Invalid : A {
+ using B = void;
+ using D = A; // expected-note {{declared as a non-template here}}
+ };
+
+ template void instantiated_invalid(Invalid); // expected-note {{in instantiation of}}
+} // namespace Unambiguous
+
+namespace Ambiguous {
+ inline namespace N {
+ struct A { }; // expected-note {{candidate found by name lookup is 'Ambiguous::N::A'}}
+ }
+
+ struct A { }; // expected-note {{candidate found by name lookup is 'Ambiguous::A'}}
+
+ template<typename T>
+ void f(T t) {
+ t.A::x; // expected-error {{reference to 'A' is ambiguous}}
+ }
+
+ struct B {
+ using A = B;
+
+ int x;
+ };
+
+ struct C { };
+
+ template void f(B);
+ template void f(C); // expected-note {{in instantiation of}}
+
+} // namespace Ambiguous
diff --git a/clang/test/CXX/class.derived/class.member.lookup/p8.cpp b/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
index 78e83c0ab4566..97d3587881bbc 100644
--- a/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
+++ b/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
@@ -47,8 +47,8 @@ template<typename T>
void DerivedT<T>::Inner() {
Derived1T<T>::Foo();
Derived2T<T>::Member = 42;
- this->Derived1T<T>::Foo();
- this->Derived2T<T>::Member = 42;
+ this->Derived1T<T>::Foo(); // expected-warning{{use 'template' keyword to treat 'Derived1T' as a dependent template name}}
+ this->Derived2T<T>::Member = 42; // expected-warning{{use 'template' keyword to treat 'Derived2T' as a dependent template name}}
this->Foo(); // expected-error{{non-static member 'Foo' found in multiple base-class subobjects of type 'BaseT<int>'}}
}
diff --git a/clang/test/CXX/drs/cwg1xx.cpp b/clang/test/CXX/drs/cwg1xx.cpp
index e7dddd1ea9278..6bca460818425 100644
--- a/clang/test/CXX/drs/cwg1xx.cpp
+++ b/clang/test/CXX/drs/cwg1xx.cpp
@@ -615,10 +615,8 @@ namespace cwg141 { // cwg141: 3.1
// cxx98-note@#cwg141-S {{lookup from the current scope refers here}}
// expected-error@#cwg141-a {{no member named 'n' in 'cwg141::A::S<int>'; did you mean '::cwg141::S<int>::n'?}}
// expected-note@#cwg141-S {{'::cwg141::S<int>::n' declared here}}
- // FIXME: we issue a useful diagnostic first, then some bogus ones.
b.f<int>();
// expected-error at -1 {{no member named 'f' in 'cwg141::B'}}
- // expected-error at -2 +{{}}
(void)b.S<int>::n;
}
template<typename T> struct C {
@@ -628,10 +626,12 @@ namespace cwg141 { // cwg141: 3.1
// expected-error at -1 {{use 'template' keyword to treat 'f' as a dependent template name}}
}
void h() {
- (void)t.S<int>::n; // ok
+ (void)t.S<int>::n;
+ // expected-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
}
void i() {
- (void)t.S<int>(); // ok!
+ (void)t.S<int>();
+ // expected-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
}
};
void h() { C<B>().h(); } // ok
diff --git a/clang/test/CXX/temp/temp.names/p3-23.cpp b/clang/test/CXX/temp/temp.names/p3-23.cpp
new file mode 100644
index 0000000000000..27c24e1d61706
--- /dev/null
+++ b/clang/test/CXX/temp/temp.names/p3-23.cpp
@@ -0,0 +1,237 @@
+// RUN: %clang_cc1 -std=c++23 -Wno-unused %s -verify
+
+namespace FoundNothing {
+ template<typename T>
+ void f0(T &t) {
+ t.x<0;
+ t.x<0>; // expected-error {{expected expression}}
+ t.x<0>1;
+ }
+
+ template<typename T>
+ struct A {
+ void f1() {
+ this->x<0; // expected-error {{no member named 'x' in 'A<T>'}}
+ this->x<0>; // expected-error {{no member named 'x' in 'A<T>'}}
+ // expected-error at -1 {{expected expression}}
+ this->x<0>1; // expected-error {{no member named 'x' in 'A<T>'}}
+ }
+ };
+} // namespace FoundNothing
+
+namespace FoundSingleNonTemplate {
+ void f0();
+
+ struct A0;
+
+ template<typename T>
+ void g0(T &t) {
+ t.f0<0;
+ t.f0<0>; // expected-error {{expected expression}}
+ t.f0<0>1;
+
+ t.A0<0;
+ t.A0<0>; // expected-error {{expected expression}}
+ t.A0<0>1;
+ }
+
+ template<typename T>
+ struct B {
+ void f1();
+
+ struct A1; // expected-note 3{{member 'A1' declared here}}
+
+ void g1() {
+ this->f0<0; // expected-error {{no member named 'f0' in 'B<T>'}}
+ this->f0<0>; // expected-error {{no member named 'f0' in 'B<T>'}}
+ // expected-error at -1 {{expected expression}}
+ this->f0<0>1; // expected-error {{no member named 'f0' in 'B<T>'}}
+
+ this->A0<0; // expected-error {{no member named 'A0' in 'B<T>'}}
+ this->A0<0>; // expected-error {{no member named 'A0' in 'B<T>'}}
+ // expected-error at -1 {{expected expression}}
+ this->A0<0>1; // expected-error {{no member named 'A0' in 'B<T>'}}
+
+ this->f1<0; // expected-error {{reference to non-static member function must be called}}
+ this->f1<0>; // expected-error {{reference to non-static member function must be called}}
+ // expected-error at -1 {{expected expression}}
+ this->f1<0>1; // expected-error {{reference to non-static member function must be called}}
+
+ this->A1<0; // expected-error {{cannot refer to type member 'A1' in 'B<T>' with '->'}}
+ this->A1<0>; // expected-error {{cannot refer to type member 'A1' in 'B<T>' with '->'}}
+ // expected-error at -1 {{expected expression}}
+ this->A1<0>1; // expected-error {{cannot refer to type member 'A1' in 'B<T>' with '->'}}
+ }
+ };
+} // namespace FoundSingleNonTemplate
+
+namespace FoundSingleTemplate {
+ template<int I>
+ void f0();
+
+ template<int I>
+ struct A0;
+
+ template<typename T>
+ void g0(T &t) {
+ t.f0<0;
+ t.f0<0>; // expected-error {{expected expression}}
+ t.f0<0>1;
+
+ t.A0<0;
+ t.A0<0>; // expected-error {{expected expression}}
+ t.A0<0>1;
+ }
+
+ template<typename T>
+ struct B {
+ template<int I>
+ void f1(); // expected-note 2{{possible target for call}}
+
+ template<int I>
+ struct A1; // expected-note 2{{member 'A1' declared here}}
+
+ void g1() {
+ this->f0<0; // expected-error {{no member named 'f0' in 'B<T>'}}
+ this->f0<0>; // expected-error {{no member named 'f0' in 'B<T>'}}
+ this->f0<0>1; // expected-error {{no member named 'f0' in 'B<T>'}}
+ // expected-error at -1 {{expected ';' after expression}}
+
+ this->A0<0; // expected-error {{no member named 'A0' in 'B<T>'}}
+ this->A0<0>; // expected-error {{no member named 'A0' in 'B<T>'}}
+ this->A0<0>1; // expected-error {{no member named 'A0' in 'B<T>'}}
+ // expected-error at -1 {{expected ';' after expression}}
+
+
+ this->f1<0; // expected-error {{expected '>'}}
+ // expected-note at -1 {{to match this '<'}}
+ this->f1<0>; // expected-error {{reference to non-static member function must be called}}
+ this->f1<0>1; // expected-error {{reference to non-static member function must be called}}
+ // expected-error at -1 {{expected ';' after expression}}
+
+ this->A1<0; // expected-error {{expected '>'}}
+ // expected-note at -1 {{to match this '<'}}
+ this->A1<0>; // expected-error {{cannot refer to member 'A1' in 'B<T>' with '->'}}
+ this->A1<0>1; // expected-error {{cannot refer to member 'A1' in 'B<T>' with '->'}}
+ // expected-error at -1 {{expected ';' after expression}}
+ }
+ };
+} // namespace FoundSingleTemplate
+
+namespace FoundAmbiguousNonTemplate {
+ inline namespace N {
+ int f0;
+
+ struct A0;
+ } // namespace N
+
+ void f0();
+
+ struct A0;
+
+ template<typename T>
+ void g0(T &t) {
+ t.f0<0;
+ t.f0<0>; // expected-error {{expected expression}}
+ t.f0<0>1;
+
+ t.A0<0;
+ t.A0<0>; // expected-error {{expected expression}}
+ t.A0<0>1;
+ }
+
+ template<typename T>
+ struct B {
+ void f1();
+
+ struct A1; // expected-note 3{{member 'A1' declared here}}
+
+ void g1() {
+ this->f0<0; // expected-error {{no member named 'f0' in 'B<T>'}}
+ this->f0<0>; // expected-error {{no member named 'f0' in 'B<T>'}}
+ // expected-error at -1 {{expected expression}}
+ this->f0<0>1; // expected-error {{no member named 'f0' in 'B<T>'}}
+
+ this->A0<0; // expected-error {{no member named 'A0' in 'B<T>'}}
+ this->A0<0>; // expected-error {{no member named 'A0' in 'B<T>'}}
+ // expected-error at -1 {{expected expression}}
+ this->A0<0>1; // expected-error {{no member named 'A0' in 'B<T>'}}
+
+ this->f1<0; // expected-error {{reference to non-static member function must be called}}
+ this->f1<0>; // expected-error {{reference to non-static member function must be called}}
+ // expected-error at -1 {{expected expression}}
+ this->f1<0>1; // expected-error {{reference to non-static member function must be called}}
+
+ this->A1<0; // expected-error {{cannot refer to type member 'A1' in 'B<T>' with '->'}}
+ this->A1<0>; // expected-error {{cannot refer to type member 'A1' in 'B<T>' with '->'}}
+ // expected-error at -1 {{expected expression}}
+ this->A1<0>1; // expected-error {{cannot refer to type member 'A1' in 'B<T>' with '->'}}
+ }
+ };
+} // namespace FoundAmbiguousNonTemplates
+
+namespace FoundAmbiguousTemplate {
+ inline namespace N {
+ template<int I>
+ int f0; // expected-note 3{{candidate found by name lookup is 'FoundAmbiguousTemplate::N::f0'}}
+
+ template<int I>
+ struct A0; // expected-note 3{{candidate found by name lookup is 'FoundAmbiguousTemplate::N::A0'}}
+ } // namespace N
+
+ template<int I>
+ void f0(); // expected-note 3{{candidate found by name lookup is 'FoundAmbiguousTemplate::f0'}}
+
+ template<int I>
+ struct A0; // expected-note 3{{candidate found by name lookup is 'FoundAmbiguousTemplate::A0'}}
+
+ template<typename T>
+ void g0(T &t) {
+ t.f0<0;
+ t.f0<0>; // expected-error {{expected expression}}
+ t.f0<0>1;
+
+ t.A0<0;
+ t.A0<0>; // expected-error {{expected expression}}
+ t.A0<0>1;
+ }
+
+ template<typename T>
+ struct B {
+ template<int I>
+ void f1(); // expected-note 2{{possible target for call}}
+
+ template<int I>
+ struct A1; // expected-note 2{{member 'A1' declared here}}
+
+ void g1() {
+ this->f0<0; // expected-error {{no member named 'f0' in 'B<T>'}}
+ // expected-error at -1 {{reference to 'f0' is ambiguous}}
+ this->f0<0>; // expected-error {{no member named 'f0' in 'B<T>'}}
+ // expected-error at -1 {{reference to 'f0' is ambiguous}}
+ this->f0<0>1; // expected-error {{no member named 'f0' in 'B<T>'}}
+ // expected-error at -1 {{expected ';' after expression}}
+ // expected-error at -2 {{reference to 'f0' is ambiguous}}
+
+ this->A0<0; // expected-error {{no member named 'A0' in 'B<T>'}}
+ // expected-error at -1 {{reference to 'A0' is ambiguous}}
+ this->A0<0>; // expected-error {{no member named 'A0' in 'B<T>'}}
+ // expected-error at -1 {{reference to 'A0' is ambiguous}}
+ this->A0<0>1; // expected-error {{no member named 'A0' in 'B<T>'}}
+ // expected-error at -1 {{expected ';' after expression}}
+ // expected-error at -2 {{reference to 'A0' is ambiguous}}
+
+ this->f1<0; // expected-error {{expected '>'}}
+ // expected-note at -1 {{to match this '<'}}
+ this->f1<0>; // expected-error {{reference to non-static member function must be called}}
+ this->f1<0>1; // expected-error {{reference to non-static member function must be called}}
+ // expected-error at -1 {{expected ';' after expression}}
+
+ this->A1<0; // expected-error {{expected '>'}}
+ // expected-note at -1 {{to match this '<'}}
+ this->A1<0>; // expected-error {{cannot refer to member 'A1' in 'B<T>' with '->'}}
+ this->A1<0>1; // expected-error {{cannot refer to member 'A1' in 'B<T>' with '->'}}
+ // expected-error at -1 {{expected ';' after expression}}
+ }
+ };
+} // namespace FoundAmbiguousTemplate
diff --git a/clang/test/CXX/temp/temp.res/p3.cpp b/clang/test/CXX/temp/temp.res/p3.cpp
index 1eda967523a59..c144acff369b1 100644
--- a/clang/test/CXX/temp/temp.res/p3.cpp
+++ b/clang/test/CXX/temp/temp.res/p3.cpp
@@ -28,6 +28,6 @@ template<typename T> int A<T>::template C<int>::*f5() {}
template<typename T> template<typename U> struct A<T>::B {
friend A<T>::C<T> f6(); // ok, same as 'friend T f6();'
- friend A<U>::C<T> f7(); // expected-error {{use 'template' keyword to treat 'C' as a dependent template name}} expected-warning {{missing 'typename'}}
+ friend A<U>::C<T> f7(); // expected-warning {{use 'template' keyword to treat 'C' as a dependent template name}} expected-warning {{missing 'typename'}}
friend A<U>::template C<T> f8(); // expected-warning {{missing 'typename'}}
};
diff --git a/clang/test/FixIt/fixit.cpp b/clang/test/FixIt/fixit.cpp
index 605c2d0bd0235..144eefb3ae4bd 100644
--- a/clang/test/FixIt/fixit.cpp
+++ b/clang/test/FixIt/fixit.cpp
@@ -158,12 +158,12 @@ class F1 {
template<class T>
class F2 {
- typename F1<T>:: /*template*/ Iterator<0> Mypos; // expected-error {{use 'template' keyword to treat 'Iterator' as a dependent template name}}
+ typename F1<T>:: /*template*/ Iterator<0> Mypos; // expected-warning {{use 'template' keyword to treat 'Iterator' as a dependent template name}}
};
template <class T>
void f(){
- typename F1<T>:: /*template*/ Iterator<0> Mypos; // expected-error {{use 'template' keyword to treat 'Iterator' as a dependent template name}}
+ typename F1<T>:: /*template*/ Iterator<0> Mypos; // expected-warning {{use 'template' keyword to treat 'Iterator' as a dependent template name}}
}
// Tests for &/* fixits
diff --git a/clang/test/Misc/warning-flags.c b/clang/test/Misc/warning-flags.c
index cdbe1e95cba96..651a86fb6e226 100644
--- a/clang/test/Misc/warning-flags.c
+++ b/clang/test/Misc/warning-flags.c
@@ -21,6 +21,7 @@ The list of warnings below should NEVER grow. It should gradually shrink to 0.
CHECK: Warnings without flags (65):
CHECK-NEXT: ext_expected_semi_decl_list
+CHECK-NEXT: ext_missing_dependent_template_keyword
CHECK-NEXT: ext_missing_whitespace_after_macro_name
CHECK-NEXT: ext_new_paren_array_nonconst
CHECK-NEXT: ext_plain_complex
@@ -61,7 +62,6 @@ CHECK-NEXT: warn_invalid_cpu_supports
CHECK-NEXT: warn_maynot_respond
CHECK-NEXT: warn_method_param_redefinition
CHECK-NEXT: warn_missing_case_for_condition
-CHECK-NEXT: warn_missing_dependent_template_keyword
CHECK-NEXT: warn_missing_whitespace_after_macro_name
CHECK-NEXT: warn_mt_message
CHECK-NEXT: warn_no_constructor_for_refconst
diff --git a/clang/test/Parser/cxx2a-concepts-requires-expr.cpp b/clang/test/Parser/cxx2a-concepts-requires-expr.cpp
index 5755844a323d2..0c7f453b5c48d 100644
--- a/clang/test/Parser/cxx2a-concepts-requires-expr.cpp
+++ b/clang/test/Parser/cxx2a-concepts-requires-expr.cpp
@@ -78,7 +78,7 @@ bool r22 = requires { typename s::~s; };
template<typename T>
bool r23 = requires { typename identity<T>::temp<T>; };
-// expected-error at -1 {{use 'template' keyword to treat 'temp' as a dependent template name}}
+// expected-warning at -1 {{use 'template' keyword to treat 'temp' as a dependent template name}}
template<typename T>
bool r24 = requires {
diff --git a/clang/test/SemaCXX/cxx0x-noexcept-expression.cpp b/clang/test/SemaCXX/cxx0x-noexcept-expression.cpp
index b3c102830f359..a01edc77e02af 100644
--- a/clang/test/SemaCXX/cxx0x-noexcept-expression.cpp
+++ b/clang/test/SemaCXX/cxx0x-noexcept-expression.cpp
@@ -127,7 +127,7 @@ void f1() {
// `dependent` should be type-dependent because the noexcept-expression should be value-dependent
// (it is true if T is int*, false if T is Polymorphic<false, false>* for example)
dependent.f<void>(); // This should need to be `.template f` to parse as a template
- // expected-error at -1 {{use 'template' keyword to treat 'f' as a dependent template name}}
+ // expected-warning at -1 {{use 'template' keyword to treat 'f' as a dependent template name}}
}
template<typename... T>
void f2() {
@@ -135,14 +135,14 @@ void f2() {
// X<true> when T...[0] is a type with some operator&& which returns int*
// X<false> when sizeof...(T) == 0
dependent.f<void>();
- // expected-error at -1 {{use 'template' keyword to treat 'f' as a dependent template name}}
+ // expected-warning at -1 {{use 'template' keyword to treat 'f' as a dependent template name}}
}
template<typename T>
void f3() {
X<noexcept(typeid(*static_cast<T*>(nullptr)))> dependent;
// X<true> when T is int, X<false> when T is Polymorphic<false, false>
dependent.f<void>();
- // expected-error at -1 {{use 'template' keyword to treat 'f' as a dependent template name}}
+ // expected-warning at -1 {{use 'template' keyword to treat 'f' as a dependent template name}}
}
template<typename T>
void f4() {
diff --git a/clang/test/SemaCXX/pseudo-destructors.cpp b/clang/test/SemaCXX/pseudo-destructors.cpp
index 55a96002be2ab..44dc9ce8b1520 100644
--- a/clang/test/SemaCXX/pseudo-destructors.cpp
+++ b/clang/test/SemaCXX/pseudo-destructors.cpp
@@ -22,21 +22,21 @@ void cv_test(const volatile T* cvt) {
void f(A* a, Foo *f, int *i, double *d, int ii) {
a->~A();
a->A::~A();
-
+
a->~foo(); // expected-error{{undeclared identifier 'foo' in destructor name}}
-
+
a->~Bar(); // expected-error{{destructor type 'Bar' (aka 'Foo') in object destruction expression does not match the type 'A' of the object being destroyed}}
-
+
f->~Bar();
f->~Foo();
i->~Bar(); // expected-error{{does not match}}
-
+
g().~Bar(); // expected-error{{non-scalar}}
-
+
f->::~Bar(); // expected-error {{not a structure or union}}
f->::Bar::~Bar();
f->N::~Wibble(); // expected-error{{'N' does not refer to a type}} expected-error{{'Wibble' does not refer to a type}}
-
+
f->Bar::~Bar(17, 42); // expected-error{{cannot have any arguments}}
i->~Integer();
@@ -148,12 +148,12 @@ namespace TwoPhaseLookup {
namespace Template {
template<typename T> struct Y {};
template<class U> using G = Y<U>;
- template<typename T> void f(T *p) { p->~G<int>(); } // expected-error {{no member named '~Y'}}
+ template<typename T> void f(T *p) { p->~G<int>(); } // expected-error {{no member named 'G'}}
void h1(Y<int> *p) { p->~G<int>(); }
- void h2(Y<int> *p) { f(p); }
+ void h2(Y<int> *p) { f(p); } // expected-note {{instantiation of}}
namespace N { template<typename T> struct G {}; }
void h3(N::G<int> *p) { p->~G<int>(); }
- void h4(N::G<int> *p) { f(p); } // expected-note {{instantiation of}}
+ void h4(N::G<int> *p) { f(p); }
}
namespace TemplateUndeclared {
diff --git a/clang/test/SemaCXX/static-assert-cxx17.cpp b/clang/test/SemaCXX/static-assert-cxx17.cpp
index 41a7b025d0eb7..754f4ae5f1d38 100644
--- a/clang/test/SemaCXX/static-assert-cxx17.cpp
+++ b/clang/test/SemaCXX/static-assert-cxx17.cpp
@@ -96,7 +96,7 @@ void foo6() {
// expected-error at -1{{static assertion failed due to requirement 'static_cast<const X<int> *>(nullptr)'}}
static_assert((const X<typename T::T>[]){} == nullptr);
// expected-error at -1{{static assertion failed due to requirement '(const X<int>[0]){} == nullptr'}}
- static_assert(sizeof(X<decltype(X<typename T::T>().X<typename T::T>::~X())>) == 0);
+ static_assert(sizeof(X<decltype(X<typename T::T>().template X<typename T::T>::~X())>) == 0);
// expected-error at -1{{static assertion failed due to requirement 'sizeof(X<void>) == 0'}} \
// expected-note at -1 {{evaluates to '8 == 0'}}
static_assert(constexpr_return_false<typename T::T, typename T::U>());
diff --git a/clang/test/SemaTemplate/dependent-base-classes.cpp b/clang/test/SemaTemplate/dependent-base-classes.cpp
index 92a37efaa7e73..4cb88a5b4070a 100644
--- a/clang/test/SemaTemplate/dependent-base-classes.cpp
+++ b/clang/test/SemaTemplate/dependent-base-classes.cpp
@@ -1,12 +1,12 @@
// RUN: %clang_cc1 -fsyntax-only -verify %s
template<typename T, typename U>
-struct X0 : T::template apply<U> {
+struct X0 : T::template apply<U> {
X0(U u) : T::template apply<U>(u) { }
};
template<typename T, typename U>
-struct X1 : T::apply<U> { }; // expected-error{{use 'template' keyword to treat 'apply' as a dependent template name}}
+struct X1 : T::apply<U> { }; // expected-warning{{use 'template' keyword to treat 'apply' as a dependent template name}}
template<typename T>
struct X2 : vector<T> { }; // expected-error{{no template named 'vector'}}
@@ -85,7 +85,7 @@ namespace PR6081 {
struct A { };
template<typename T>
- class B : public A<T>
+ class B : public A<T>
{
public:
template< class X >
@@ -109,9 +109,9 @@ namespace PR6081 {
namespace PR6413 {
template <typename T> class Base_A { };
-
+
class Base_B { };
-
+
template <typename T>
class Derived
: public virtual Base_A<T>
@@ -120,12 +120,12 @@ namespace PR6413 {
}
namespace PR5812 {
- template <class T> struct Base {
- Base* p;
- };
+ template <class T> struct Base {
+ Base* p;
+ };
- template <class T> struct Derived: public Base<T> {
- typename Derived::Base* p; // meaning Derived::Base<T>
+ template <class T> struct Derived: public Base<T> {
+ typename Derived::Base* p; // meaning Derived::Base<T>
};
Derived<int> di;
diff --git a/clang/test/SemaTemplate/dependent-template-recover.cpp b/clang/test/SemaTemplate/dependent-template-recover.cpp
index c7e27e8da25f1..c763989e6dadb 100644
--- a/clang/test/SemaTemplate/dependent-template-recover.cpp
+++ b/clang/test/SemaTemplate/dependent-template-recover.cpp
@@ -2,15 +2,15 @@
template<typename T, typename U, int N>
struct X {
void f(T* t) {
- t->f0<U>(); // expected-error{{use 'template' keyword to treat 'f0' as a dependent template name}}
- t->f0<int>(); // expected-error{{use 'template' keyword to treat 'f0' as a dependent template name}}
+ t->f0<U>(); // expected-warning{{use 'template' keyword to treat 'f0' as a dependent template name}}
+ t->f0<int>(); // expected-warning{{use 'template' keyword to treat 'f0' as a dependent template name}}
- t->operator+<U const, 1>(1); // expected-error{{use 'template' keyword to treat 'operator +' as a dependent template name}}
- t->f1<int const, 2>(1); // expected-error{{use 'template' keyword to treat 'f1' as a dependent template name}}
+ t->operator+<U const, 1>(1); // expected-warning{{use 'template' keyword to treat 'operator +' as a dependent template name}}
+ t->f1<int const, 2>(1); // expected-warning{{use 'template' keyword to treat 'f1' as a dependent template name}}
t->f1<3, int const>(1); // expected-error{{missing 'template' keyword prior to dependent template name 'f1'}}
- T::getAs<U>(); // expected-error{{use 'template' keyword to treat 'getAs' as a dependent template name}}
- t->T::getAs<U>(); // expected-error{{use 'template' keyword to treat 'getAs' as a dependent template name}}
+ T::getAs<U>(); // expected-warning{{use 'template' keyword to treat 'getAs' as a dependent template name}}
+ t->T::getAs<U>(); // expected-warning{{use 'template' keyword to treat 'getAs' as a dependent template name}}
(*t).f2<N>(); // expected-error{{missing 'template' keyword prior to dependent template name 'f2'}}
(*t).f2<0>(); // expected-error{{missing 'template' keyword prior to dependent template name 'f2'}}
diff --git a/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp b/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp
index ad73daa8e214c..7768d2f03ac5b 100644
--- a/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp
+++ b/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp
@@ -115,7 +115,7 @@ namespace CopyCounting {
static_assert(f(X<A{}>()) == 0);
template<A a> struct Y { void f(); };
- template<A a> void g(Y<a> y) { y.Y<a>::f(); }
+ template<A a> void g(Y<a> y) { y.template Y<a>::f(); }
void h() { constexpr A a; g<a>(Y<a>{}); }
template<A a> struct Z {
diff --git a/clang/test/SemaTemplate/template-id-expr.cpp b/clang/test/SemaTemplate/template-id-expr.cpp
index dc12823ae307f..760d6c5852403 100644
--- a/clang/test/SemaTemplate/template-id-expr.cpp
+++ b/clang/test/SemaTemplate/template-id-expr.cpp
@@ -19,7 +19,7 @@ template<typename T>
struct X0 {
template<typename U>
void f1();
-
+
template<typename U>
void f2(U) {
f1<U>();
@@ -39,9 +39,9 @@ struct Y {
template<int I>
struct X {
X(int, int);
- void f() {
- Y<X<I> >(X<I>(0, 0));
- Y<X<I> >(::X<I>(0, 0));
+ void f() {
+ Y<X<I> >(X<I>(0, 0));
+ Y<X<I> >(::X<I>(0, 0));
}
};
@@ -149,11 +149,11 @@ struct Y2 : Y1<T> {
int x;
x = Y1::f4(0);
- x = Y1::f4<int>(0); // expected-error {{use 'template'}} expected-error {{assigning to 'int' from incompatible type 'void'}}
+ x = Y1::f4<int>(0); // expected-warning {{use 'template'}} expected-error {{assigning to 'int' from incompatible type 'void'}}
x = Y1::template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} expected-error {{a template argument list is expected after a name prefixed by the template keyword}}
x = p->f4(0);
- x = p->f4<int>(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} expected-error {{use 'template'}}
+ x = p->f4<int>(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} expected-warning {{use 'template'}}
x = p->template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} expected-error {{a template argument list is expected after a name prefixed by the template keyword}}
}
};
@@ -184,7 +184,7 @@ class E {
#if __cplusplus <= 199711L
// expected-warning at +2 {{extension}}
#endif
-template<typename T> using D = int; // expected-note {{declared here}}
+template<typename T> using D = int; // expected-note {{declared here}}
E<D> ed; // expected-note {{instantiation of}}
namespace non_functions {
diff --git a/clang/test/SemaTemplate/typename-specifier-3.cpp b/clang/test/SemaTemplate/typename-specifier-3.cpp
index 714830f0032d2..a9010969322e5 100644
--- a/clang/test/SemaTemplate/typename-specifier-3.cpp
+++ b/clang/test/SemaTemplate/typename-specifier-3.cpp
@@ -46,7 +46,7 @@ namespace PR12884_half_fixed {
typedef int arg;
};
struct C {
- typedef typename B::X<typename B::arg> x; // expected-error {{use 'template'}} expected-error {{refers to non-type}}
+ typedef typename B::X<typename B::arg> x; // expected-warning {{use 'template'}} expected-error {{refers to non-type}}
};
};
diff --git a/libcxx/include/regex b/libcxx/include/regex
index b814135121321..17ad0cf5b2aea 100644
--- a/libcxx/include/regex
+++ b/libcxx/include/regex
@@ -4214,7 +4214,7 @@ public:
_LIBCPP_HIDE_FROM_ABI int compare(const value_type* __s) const { return str().compare(__s); }
_LIBCPP_HIDE_FROM_ABI void swap(sub_match& __s) _NOEXCEPT_(__is_nothrow_swappable_v<_BidirectionalIterator>) {
- this->pair<_BidirectionalIterator, _BidirectionalIterator>::swap(__s);
+ this->template pair<_BidirectionalIterator, _BidirectionalIterator>::swap(__s);
std::swap(matched, __s.matched);
}
};
>From 160c464924326ab82caa59ce77491e67f1387e5c Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Thu, 18 Jul 2024 09:51:28 -0400
Subject: [PATCH 02/15] [FOLD] emit better missing 'template' keyword
diagnostics for dependent class member access
---
clang/include/clang/Parse/Parser.h | 2 +-
clang/lib/Parse/ParseExpr.cpp | 3 +--
clang/lib/Parse/ParseExprCXX.cpp | 8 ++++----
clang/lib/Parse/ParseOpenMP.cpp | 4 +---
clang/lib/Parse/ParseTemplate.cpp | 32 ++++++++++++++++++++++++++++++
5 files changed, 39 insertions(+), 10 deletions(-)
diff --git a/clang/include/clang/Parse/Parser.h b/clang/include/clang/Parse/Parser.h
index 99e6d8a343469..66bd3790f9818 100644
--- a/clang/include/clang/Parse/Parser.h
+++ b/clang/include/clang/Parse/Parser.h
@@ -1967,7 +1967,7 @@ class Parser : public CodeCompletionHandler {
//===--------------------------------------------------------------------===//
// C++ Expressions
ExprResult tryParseCXXIdExpression(CXXScopeSpec &SS, bool isAddressOfOperand,
- Token &Replacement);
+ Token *Replacement = nullptr);
ExprResult tryParseCXXPackIndexingExpression(ExprResult PackIdExpression);
ExprResult ParseCXXPackIndexingExpression(ExprResult PackIdExpression);
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index 5953717e75d97..437b87acac35f 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -1163,8 +1163,7 @@ ExprResult Parser::ParseCastExpression(CastParseKind ParseKind,
case tok::annot_non_type_dependent:
case tok::annot_non_type_undeclared: {
CXXScopeSpec SS;
- Token Replacement;
- Res = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement);
+ Res = tryParseCXXIdExpression(SS, isAddressOfOperand);
assert(!Res.isUnset() &&
"should not perform typo correction on annotation token");
break;
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index ad0758a616380..cb607880eb860 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -603,7 +603,7 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
ExprResult Parser::tryParseCXXIdExpression(CXXScopeSpec &SS,
bool isAddressOfOperand,
- Token &Replacement) {
+ Token *Replacement) {
ExprResult E;
// We may have already annotated this id-expression.
@@ -657,7 +657,7 @@ ExprResult Parser::tryParseCXXIdExpression(CXXScopeSpec &SS,
E = Actions.ActOnIdExpression(
getCurScope(), SS, TemplateKWLoc, Name, Tok.is(tok::l_paren),
isAddressOfOperand, /*CCC=*/nullptr, /*IsInlineAsmIdentifier=*/false,
- &Replacement);
+ Replacement);
break;
}
@@ -747,12 +747,12 @@ ExprResult Parser::ParseCXXIdExpression(bool isAddressOfOperand) {
Token Replacement;
ExprResult Result =
- tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement);
+ tryParseCXXIdExpression(SS, isAddressOfOperand, &Replacement);
if (Result.isUnset()) {
// If the ExprResult is valid but null, then typo correction suggested a
// keyword replacement that needs to be reparsed.
UnconsumeToken(Replacement);
- Result = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement);
+ Result = tryParseCXXIdExpression(SS, isAddressOfOperand);
}
assert(!Result.isUnset() && "Typo correction suggested a keyword replacement "
"for a previous keyword suggestion");
diff --git a/clang/lib/Parse/ParseOpenMP.cpp b/clang/lib/Parse/ParseOpenMP.cpp
index e975e96c5c7e4..94b966b5fa276 100644
--- a/clang/lib/Parse/ParseOpenMP.cpp
+++ b/clang/lib/Parse/ParseOpenMP.cpp
@@ -3016,12 +3016,10 @@ OMPClause *Parser::ParseOpenMPUsesAllocatorClause(OpenMPDirectiveKind DKind) {
SmallVector<SemaOpenMP::UsesAllocatorsData, 4> Data;
do {
CXXScopeSpec SS;
- Token Replacement;
ExprResult Allocator =
getLangOpts().CPlusPlus
? ParseCXXIdExpression()
- : tryParseCXXIdExpression(SS, /*isAddressOfOperand=*/false,
- Replacement);
+ : tryParseCXXIdExpression(SS, /*isAddressOfOperand=*/false);
if (Allocator.isInvalid()) {
SkipUntil(tok::comma, tok::r_paren, tok::annot_pragma_openmp_end,
StopBeforeMatch);
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index a5130f56600e5..ac51052754c25 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -1802,6 +1802,38 @@ bool Parser::checkPotentialAngleBracketDelimiter(
return true;
}
+ if (OpToken.is(tok::greater) && Tok.is(tok::coloncolon)) {
+ SourceLocation StartLoc = Tok.getLocation();
+ CXXScopeSpec SS;
+ ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
+ /*ObjectHasErrors=*/false,
+ /*EnteringContext=*/false);
+ ExprResult Result =
+ tryParseCXXIdExpression(SS, /*isAddressOfOperand=*/false);
+ bool Invalid = !Result.isUsable() || Result.get()->containsErrors();
+ Result = Actions.CorrectDelayedTyposInExpr(Result);
+
+ if (PP.isBacktrackEnabled())
+ PP.RevertCachedTokens(1);
+ else
+ PP.EnterToken(Tok, /*IsReinject=*/true);
+
+ SourceLocation EndLoc = Tok.getLocation();
+ Tok.setLocation(StartLoc);
+ Tok.setKind(tok::annot_primary_expr);
+ setExprAnnotation(Tok, Result);
+ Tok.setAnnotationEndLoc(EndLoc);
+ PP.AnnotateCachedTokens(Tok);
+
+ if (Invalid) {
+ Actions.diagnoseExprIntendedAsTemplateName(
+ getCurScope(), LAngle.TemplateName, LAngle.LessLoc,
+ OpToken.getLocation());
+ AngleBrackets.clear(*this);
+ return true;
+ }
+ }
+
// After a '>' (etc), we're no longer potentially in a construct that's
// intended to be treated as a template-id.
if (OpToken.is(tok::greater) ||
>From 6fe4ee99712830f5f06690953fc1392351b5b693 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Thu, 18 Jul 2024 10:19:25 -0400
Subject: [PATCH 03/15] [FOLD] disable type correction when disambiguating
---
clang/include/clang/Sema/Sema.h | 26 ++++++++++++++++----------
clang/lib/Parse/ParseTemplate.cpp | 6 +++---
2 files changed, 19 insertions(+), 13 deletions(-)
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 3e897aec55391..df07842dca573 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -12103,25 +12103,31 @@ class Sema final : public SemaBase {
}
};
+ class DisableTypoCorrectionRAII {
+ Sema &SemaRef;
+ bool PrevDisableTypoCorrection;
+
+ public:
+ explicit DisableTypoCorrectionRAII(Sema &SemaRef)
+ : SemaRef(SemaRef), PrevDisableTypoCorrection(std::exchange(
+ SemaRef.DisableTypoCorrection, true)) {}
+
+ ~DisableTypoCorrectionRAII() {
+ SemaRef.DisableTypoCorrection = PrevDisableTypoCorrection;
+ }
+ };
+
/// RAII class used to indicate that we are performing provisional
/// semantic analysis to determine the validity of a construct, so
/// typo-correction and diagnostics in the immediate context (not within
/// implicitly-instantiated templates) should be suppressed.
- class TentativeAnalysisScope {
- Sema &SemaRef;
+ class TentativeAnalysisScope : public DisableTypoCorrectionRAII {
// FIXME: Using a SFINAETrap for this is a hack.
SFINAETrap Trap;
- bool PrevDisableTypoCorrection;
public:
explicit TentativeAnalysisScope(Sema &SemaRef)
- : SemaRef(SemaRef), Trap(SemaRef, true),
- PrevDisableTypoCorrection(SemaRef.DisableTypoCorrection) {
- SemaRef.DisableTypoCorrection = true;
- }
- ~TentativeAnalysisScope() {
- SemaRef.DisableTypoCorrection = PrevDisableTypoCorrection;
- }
+ : DisableTypoCorrectionRAII(SemaRef), Trap(SemaRef, true) {}
};
/// For each declaration that involved template argument deduction, the
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index ac51052754c25..84ad04d6ca9f6 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -1803,6 +1803,8 @@ bool Parser::checkPotentialAngleBracketDelimiter(
}
if (OpToken.is(tok::greater) && Tok.is(tok::coloncolon)) {
+ Sema::DisableTypoCorrectionRAII DTC(Actions);
+
SourceLocation StartLoc = Tok.getLocation();
CXXScopeSpec SS;
ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
@@ -1810,8 +1812,6 @@ bool Parser::checkPotentialAngleBracketDelimiter(
/*EnteringContext=*/false);
ExprResult Result =
tryParseCXXIdExpression(SS, /*isAddressOfOperand=*/false);
- bool Invalid = !Result.isUsable() || Result.get()->containsErrors();
- Result = Actions.CorrectDelayedTyposInExpr(Result);
if (PP.isBacktrackEnabled())
PP.RevertCachedTokens(1);
@@ -1825,7 +1825,7 @@ bool Parser::checkPotentialAngleBracketDelimiter(
Tok.setAnnotationEndLoc(EndLoc);
PP.AnnotateCachedTokens(Tok);
- if (Invalid) {
+ if (Result.isInvalid()) {
Actions.diagnoseExprIntendedAsTemplateName(
getCurScope(), LAngle.TemplateName, LAngle.LessLoc,
OpToken.getLocation());
>From c7441a242fac30cdb1ebd87035c0558ec4e808ce Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Thu, 18 Jul 2024 12:00:11 -0400
Subject: [PATCH 04/15] [FOLD] only enable cwg1835 behavior in c++23 and up
---
clang/lib/Sema/SemaTemplate.cpp | 61 ++++++++++---------
.../class.derived/class.member.lookup/p8.cpp | 4 +-
clang/test/CXX/drs/cwg13xx.cpp | 13 ++--
clang/test/CXX/drs/cwg1xx.cpp | 18 +++---
clang/test/SemaCXX/pseudo-destructors.cpp | 15 +++--
5 files changed, 63 insertions(+), 48 deletions(-)
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 91cc9881ceb8b..262618a0c6d27 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -410,6 +410,35 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
LookupParsedName(Found, S, &SS, ObjectType,
/*AllowBuiltinCreation=*/false, EnteringContext);
+ bool ObjectTypeSearchedInScope = false;
+
+ // C++ [basic.lookup.qual.general]p2:
+ // A member-qualified name is the (unique) component name, if any, of
+ // - an unqualified-id or
+ // - a nested-name-specifier of the form type-name :: or namespace-name ::
+ // in the id-expression of a class member access expression.
+ //
+ // C++ [basic.lookup.qual.general]p3:
+ // [...] If nothing is found by qualified lookup for a member-qualified
+ // name that is the terminal name of a nested-name-specifier and is not
+ // dependent, it undergoes unqualified lookup.
+ //
+ // In 'x.A::B::y', 'A' will undergo unqualified lookup if qualified lookup
+ // in the type of 'x' finds nothing. If the lookup context is dependent,
+ // we perform the unqualified lookup in the template definition context
+ // and store the results so we can replicate the lookup during instantiation.
+ if (MayBeNNS && Found.empty() && !ObjectType.isNull() &&
+ (!getLangOpts().CPlusPlus23 ||
+ !Found.wasNotFoundInCurrentInstantiation())) {
+ if (S) {
+ LookupName(Found, S);
+ } else if (!SS.getUnqualifiedLookups().empty()) {
+ Found.addAllDecls(SS.getUnqualifiedLookups());
+ Found.resolveKind();
+ }
+ ObjectTypeSearchedInScope = true;
+ }
+
// C++ [basic.lookup.qual.general]p3:
// [...] Unless otherwise specified, a qualified name undergoes qualified
// name lookup in its lookup context from the point where it appears unless
@@ -445,33 +474,6 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
if (Found.wasNotFoundInCurrentInstantiation())
return false;
- bool ObjectTypeSearchedInScope = false;
-
- // C++ [basic.lookup.qual.general]p2:
- // A member-qualified name is the (unique) component name, if any, of
- // - an unqualified-id or
- // - a nested-name-specifier of the form type-name :: or namespace-name ::
- // in the id-expression of a class member access expression.
- //
- // C++ [basic.lookup.qual.general]p3:
- // [...] If nothing is found by qualified lookup for a member-qualified
- // name that is the terminal name of a nested-name-specifier and is not
- // dependent, it undergoes unqualified lookup.
- //
- // In 'x.A::B::y', 'A' will undergo unqualified lookup if qualified lookup
- // in the type of 'x' finds nothing. If the lookup context is dependent,
- // we perform the unqualified lookup in the template definition context
- // and store the results so we can replicate the lookup during instantiation.
- if (MayBeNNS && Found.empty() && !ObjectType.isNull()) {
- if (S) {
- LookupName(Found, S);
- } else if (!SS.getUnqualifiedLookups().empty()) {
- Found.addAllDecls(SS.getUnqualifiedLookups());
- Found.resolveKind();
- }
- ObjectTypeSearchedInScope = true;
- }
-
if (Found.isAmbiguous())
return false;
@@ -542,7 +544,10 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
NamedDecl *ExampleLookupResult =
Found.empty() ? nullptr : Found.getRepresentativeDecl();
- FilterAcceptableTemplateNames(Found);
+ FilterAcceptableTemplateNames(
+ Found,
+ /*AllowFunctionTemplates=*/getLangOpts().CPlusPlus23 ||
+ !ObjectTypeSearchedInScope);
if (Found.empty()) {
// If a 'template' keyword was used, a lookup that finds only non-template
// names is an error.
diff --git a/clang/test/CXX/class.derived/class.member.lookup/p8.cpp b/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
index 97d3587881bbc..78e83c0ab4566 100644
--- a/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
+++ b/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
@@ -47,8 +47,8 @@ template<typename T>
void DerivedT<T>::Inner() {
Derived1T<T>::Foo();
Derived2T<T>::Member = 42;
- this->Derived1T<T>::Foo(); // expected-warning{{use 'template' keyword to treat 'Derived1T' as a dependent template name}}
- this->Derived2T<T>::Member = 42; // expected-warning{{use 'template' keyword to treat 'Derived2T' as a dependent template name}}
+ this->Derived1T<T>::Foo();
+ this->Derived2T<T>::Member = 42;
this->Foo(); // expected-error{{non-static member 'Foo' found in multiple base-class subobjects of type 'BaseT<int>'}}
}
diff --git a/clang/test/CXX/drs/cwg13xx.cpp b/clang/test/CXX/drs/cwg13xx.cpp
index 416de7c536b1a..a19086b9dc90d 100644
--- a/clang/test/CXX/drs/cwg13xx.cpp
+++ b/clang/test/CXX/drs/cwg13xx.cpp
@@ -1,8 +1,8 @@
-// RUN: %clang_cc1 -std=c++98 %s -verify=expected,cxx98-14,cxx98 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++11 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,cxx98-14,since-cxx11,cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++14 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,since-cxx14,cxx98-14,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++17 %s -verify=expected,cxx11-20,cxx11-17,since-cxx14,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++20 %s -verify=expected,cxx11-20,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++98 %s -verify=expected,cxx98-14,cxx98-20,cxx98 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++11 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,cxx98-14,cxx98-20,since-cxx11,cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++14 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,since-cxx14,cxx98-14,cxx98-20,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++17 %s -verify=expected,cxx11-20,cxx11-17,cxx98-20,since-cxx14,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++20 %s -verify=expected,cxx11-20,cxx98-20,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++23 %s -verify=expected,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++2c %s -verify=expected,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
@@ -136,6 +136,7 @@ namespace cwg1310 { // cwg1310: 5
// expected-error at -1 {{ISO C++ specifies that qualified reference to 'W' is a constructor name rather than a template name in this context, despite preceding 'template' keyword}}
}
template<typename W>
+ // cxx98-20-note at -1 2{{declared as a non-template here}}
void wt_test_good() {
typename W::W::X w2ax;
typename W::template W<int>::X w4x;
@@ -146,7 +147,9 @@ namespace cwg1310 { // cwg1310: 5
(void)w.W::W::n;
(void)w.W::template W<int>::n;
(void)w.template W<int>::W::n;
+ // cxx98-20-error at -1 {{'W' following the 'template' keyword does not refer to a template}}
(void)w.template W<int>::template W<int>::n;
+ // cxx98-20-error at -1 {{'W' following the 'template' keyword does not refer to a template}}
}
template void wt_test<W<int> >(); // #cwg1310-W-int
template void wt_test_good<W<int> >();
diff --git a/clang/test/CXX/drs/cwg1xx.cpp b/clang/test/CXX/drs/cwg1xx.cpp
index 6bca460818425..86fe56a19b15f 100644
--- a/clang/test/CXX/drs/cwg1xx.cpp
+++ b/clang/test/CXX/drs/cwg1xx.cpp
@@ -1,9 +1,9 @@
-// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected,cxx98,cxx98-11,cxx98-14,cxx98-17 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-11,cxx98-14,cxx98-17,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-14,cxx98-17,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,cxx98-17 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected,cxx98,cxx98-11,cxx98-14,cxx98-17,cxx98-20 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-11,cxx98-14,cxx98-17,cxx98-20,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-14,cxx98-17,cxx98-20,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,cxx98-17,cxx98-20 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,cxx98-20 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,since-cxx23 -fexceptions -fcxx-exceptions -pedantic-errors
#if __cplusplus == 199711L
#define static_assert(...) __extension__ _Static_assert(__VA_ARGS__)
@@ -617,6 +617,8 @@ namespace cwg141 { // cwg141: 3.1
// expected-note@#cwg141-S {{'::cwg141::S<int>::n' declared here}}
b.f<int>();
// expected-error at -1 {{no member named 'f' in 'cwg141::B'}}
+ // cxx98-20-error at -2 {{expected '(' for function-style cast or type construction}}
+ // cxx98-20-error at -3 {{expected expression}}
(void)b.S<int>::n;
}
template<typename T> struct C {
@@ -627,11 +629,11 @@ namespace cwg141 { // cwg141: 3.1
}
void h() {
(void)t.S<int>::n;
- // expected-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
+ // since-cxx23-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
}
void i() {
(void)t.S<int>();
- // expected-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
+ // since-cxx23-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
}
};
void h() { C<B>().h(); } // ok
diff --git a/clang/test/SemaCXX/pseudo-destructors.cpp b/clang/test/SemaCXX/pseudo-destructors.cpp
index 44dc9ce8b1520..a630c54bd0bec 100644
--- a/clang/test/SemaCXX/pseudo-destructors.cpp
+++ b/clang/test/SemaCXX/pseudo-destructors.cpp
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -emit-llvm-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -emit-llvm-only -std=c++11 -verify=expected,cxx98-20 %s
+// RUN: %clang_cc1 -emit-llvm-only -std=c++23 -verify=expected,since-cxx23 %s
struct A {};
enum Foo { F };
@@ -148,12 +149,13 @@ namespace TwoPhaseLookup {
namespace Template {
template<typename T> struct Y {};
template<class U> using G = Y<U>;
- template<typename T> void f(T *p) { p->~G<int>(); } // expected-error {{no member named 'G'}}
+ template<typename T> void f(T *p) { p->~G<int>(); } // since-cxx23-error {{no member named 'G'}}
+ // cxx98-20-error at -1 {{no member named '~Y' in 'TwoPhaseLookup::Template::N::G<int>'}}
void h1(Y<int> *p) { p->~G<int>(); }
- void h2(Y<int> *p) { f(p); } // expected-note {{instantiation of}}
+ void h2(Y<int> *p) { f(p); } // since-cxx23-note {{in instantiation of}}
namespace N { template<typename T> struct G {}; }
void h3(N::G<int> *p) { p->~G<int>(); }
- void h4(N::G<int> *p) { f(p); }
+ void h4(N::G<int> *p) { f(p); } // cxx98-20-note {{in instantiation of}}
}
namespace TemplateUndeclared {
@@ -172,7 +174,10 @@ namespace TwoPhaseLookup {
namespace TemplateNamesNonTemplate {
int A; // expected-note 2{{non-template here}}
- template<typename> int B; // expected-note 2{{variable template 'B' declared here}} expected-warning {{extension}}
+ template<typename> int B; // expected-note 2{{variable template 'B' declared here}}
+ #if __cplusplus < 201402L
+ // expected-warning at -2 {{extension}}
+ #endif
using C = int; // expected-note 2{{non-template here}}
template<typename T> void f1(int *p) { p->~A<int>(); } // expected-error {{'A' does not refer to a template}}
>From 236f28bdd16fca92a3774d104665f461aba2dded Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Thu, 18 Jul 2024 12:59:50 -0400
Subject: [PATCH 05/15] [FOLD] minor cleanup
---
clang/lib/Parse/ParseExprCXX.cpp | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index cb607880eb860..8e8489461da2d 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -539,10 +539,8 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
// anyway. C++20 requires this, and in prior language modes it improves
// error recovery. But before we commit to this, check that we actually
// have something that looks like a template-argument-list next.
- if (!IsTypename &&
- (TNK == TNK_Undeclared_template ||
- (!HasScopeSpecifier && ObjectType)) &&
- isTemplateArgumentList(1) == TPResult::False)
+ if (!IsTypename && (ObjectType || TNK == TNK_Undeclared_template) &&
+ isTemplateArgumentList(1) == TPResult::False)
break;
// We have found a template name, so annotate this token
>From d1d3f29f5158c3be48a522b1b1c421429280a20e Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Thu, 18 Jul 2024 16:51:49 -0400
Subject: [PATCH 06/15] [FOLD] don't annotate types as id-expressions
---
clang/include/clang/Parse/Parser.h | 1 +
clang/lib/Parse/ParseTemplate.cpp | 68 ++++++++++++++-----------
clang/lib/Sema/SemaCXXScopeSpec.cpp | 4 ++
clang/test/SemaCXX/nested-name-spec.cpp | 8 +--
4 files changed, 47 insertions(+), 34 deletions(-)
diff --git a/clang/include/clang/Parse/Parser.h b/clang/include/clang/Parse/Parser.h
index 66bd3790f9818..c02c9859b2cc5 100644
--- a/clang/include/clang/Parse/Parser.h
+++ b/clang/include/clang/Parse/Parser.h
@@ -1907,6 +1907,7 @@ class Parser : public CodeCompletionHandler {
}
bool diagnoseUnknownTemplateId(ExprResult TemplateName, SourceLocation Less);
+ bool isMissingTemplateKeywordBeforeScope();
void checkPotentialAngleBracket(ExprResult &PotentialTemplateName);
bool checkPotentialAngleBracketDelimiter(const AngleBracketTracker::Loc &,
const Token &OpToken);
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index 84ad04d6ca9f6..ac50cbbb56232 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -1779,6 +1779,36 @@ void Parser::checkPotentialAngleBracket(ExprResult &PotentialTemplateName) {
Priority);
}
+bool Parser::isMissingTemplateKeywordBeforeScope() {
+ assert(Tok.is(tok::coloncolon));
+ Sema::DisableTypoCorrectionRAII DTC(Actions);
+ ColonProtectionRAIIObject ColonProtection(*this);
+
+ SourceLocation StartLoc = Tok.getLocation();
+ if (TryAnnotateTypeOrScopeToken())
+ return true;
+ if (Tok.isSimpleTypeSpecifier(getLangOpts()))
+ return false;
+ CXXScopeSpec SS;
+ ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
+ /*ObjectHasErrors=*/false,
+ /*EnteringContext=*/false);
+ ExprResult Result = tryParseCXXIdExpression(SS, /*isAddressOfOperand=*/false);
+
+ if (PP.isBacktrackEnabled())
+ PP.RevertCachedTokens(1);
+ else
+ PP.EnterToken(Tok, /*IsReinject=*/true);
+
+ SourceLocation EndLoc = Tok.getLocation();
+ Tok.setLocation(StartLoc);
+ Tok.setKind(tok::annot_primary_expr);
+ setExprAnnotation(Tok, Result);
+ Tok.setAnnotationEndLoc(EndLoc);
+ PP.AnnotateCachedTokens(Tok);
+ return Result.isInvalid();
+}
+
bool Parser::checkPotentialAngleBracketDelimiter(
const AngleBracketTracker::Loc &LAngle, const Token &OpToken) {
// If a comma in an expression context is followed by a type that can be a
@@ -1802,36 +1832,14 @@ bool Parser::checkPotentialAngleBracketDelimiter(
return true;
}
- if (OpToken.is(tok::greater) && Tok.is(tok::coloncolon)) {
- Sema::DisableTypoCorrectionRAII DTC(Actions);
-
- SourceLocation StartLoc = Tok.getLocation();
- CXXScopeSpec SS;
- ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
- /*ObjectHasErrors=*/false,
- /*EnteringContext=*/false);
- ExprResult Result =
- tryParseCXXIdExpression(SS, /*isAddressOfOperand=*/false);
-
- if (PP.isBacktrackEnabled())
- PP.RevertCachedTokens(1);
- else
- PP.EnterToken(Tok, /*IsReinject=*/true);
-
- SourceLocation EndLoc = Tok.getLocation();
- Tok.setLocation(StartLoc);
- Tok.setKind(tok::annot_primary_expr);
- setExprAnnotation(Tok, Result);
- Tok.setAnnotationEndLoc(EndLoc);
- PP.AnnotateCachedTokens(Tok);
-
- if (Result.isInvalid()) {
- Actions.diagnoseExprIntendedAsTemplateName(
- getCurScope(), LAngle.TemplateName, LAngle.LessLoc,
- OpToken.getLocation());
- AngleBrackets.clear(*this);
- return true;
- }
+ if (OpToken.is(tok::greater) && Tok.is(tok::coloncolon) &&
+ !NextToken().isOneOf(tok::kw_new, tok::kw_delete) &&
+ isMissingTemplateKeywordBeforeScope()) {
+ Actions.diagnoseExprIntendedAsTemplateName(
+ getCurScope(), LAngle.TemplateName, LAngle.LessLoc,
+ OpToken.getLocation());
+ AngleBrackets.clear(*this);
+ return true;
}
// After a '>' (etc), we're no longer potentially in a construct that's
diff --git a/clang/lib/Sema/SemaCXXScopeSpec.cpp b/clang/lib/Sema/SemaCXXScopeSpec.cpp
index dd61bb22e3dfa..8a74cd64be15d 100644
--- a/clang/lib/Sema/SemaCXXScopeSpec.cpp
+++ b/clang/lib/Sema/SemaCXXScopeSpec.cpp
@@ -685,6 +685,7 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
if (ErrorRecoveryLookup)
return true;
+#if 0
// If we didn't find anything during our lookup, try again with
// ordinary name lookup, which can help us produce better error
// messages.
@@ -692,6 +693,7 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
Found.clear(LookupOrdinaryName);
LookupName(Found, S);
}
+#endif
// In Microsoft mode, if we are within a templated function and we can't
// resolve Identifier, then extend the SS with Identifier. This will have
@@ -733,6 +735,7 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
}
}
+#if 1
if (!Found.empty()) {
if (TypeDecl *TD = Found.getAsSingle<TypeDecl>()) {
Diag(IdInfo.IdentifierLoc, diag::err_expected_class_or_namespace)
@@ -754,6 +757,7 @@ bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo,
else
Diag(IdInfo.IdentifierLoc, diag::err_undeclared_var_use)
<< IdInfo.Identifier;
+#endif
return true;
}
diff --git a/clang/test/SemaCXX/nested-name-spec.cpp b/clang/test/SemaCXX/nested-name-spec.cpp
index 920ef42bc1564..ce4af7a17c0ff 100644
--- a/clang/test/SemaCXX/nested-name-spec.cpp
+++ b/clang/test/SemaCXX/nested-name-spec.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fsyntax-only -std=c++98 -verify -fblocks %s
+// RUN: %clang_cc1 -fsyntax-only -std=c++98 -verify -fblocks %s
namespace A {
struct C {
static int cx;
@@ -109,7 +109,7 @@ void A2::CC::NC::m(); // expected-error{{out-of-line declaration of a member mus
namespace E {
int X = 5;
-
+
namespace Nested {
enum E {
X = 0
@@ -143,7 +143,7 @@ Operators::operator bool() {
namespace A {
void g(int&); // expected-note{{type of 1st parameter of member declaration does not match definition ('int &' vs 'const int &')}}
-}
+}
void A::f() {} // expected-error-re{{out-of-line definition of 'f' does not match any declaration in namespace 'A'{{$}}}}
@@ -458,7 +458,7 @@ namespace A {
class B {
typedef C D; // expected-error{{unknown type name 'C'}}
A::D::F;
- // expected-error at -1{{'PR30619::A::B::D' (aka 'int') is not a class, namespace, or enumeration}}
+ // expected-error at -1{{no member named 'D' in namespace 'PR30619::A'}}
};
}
}
>From 81a46e396789ee3a4a451f010a902916d0258a5f Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Fri, 19 Jul 2024 15:29:03 -0400
Subject: [PATCH 07/15] [FOLD] fix pre-c++23 compat
---
clang/lib/Sema/SemaTemplate.cpp | 21 +++++++++++----------
clang/test/CXX/drs/cwg13xx.cpp | 13 +++++--------
2 files changed, 16 insertions(+), 18 deletions(-)
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 262618a0c6d27..17656c57bb986 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -410,6 +410,8 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
LookupParsedName(Found, S, &SS, ObjectType,
/*AllowBuiltinCreation=*/false, EnteringContext);
+ bool IsDependent = Found.wasNotFoundInCurrentInstantiation();
+
bool ObjectTypeSearchedInScope = false;
// C++ [basic.lookup.qual.general]p2:
@@ -428,8 +430,7 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
// we perform the unqualified lookup in the template definition context
// and store the results so we can replicate the lookup during instantiation.
if (MayBeNNS && Found.empty() && !ObjectType.isNull() &&
- (!getLangOpts().CPlusPlus23 ||
- !Found.wasNotFoundInCurrentInstantiation())) {
+ (!getLangOpts().CPlusPlus23 || !IsDependent)) {
if (S) {
LookupName(Found, S);
} else if (!SS.getUnqualifiedLookups().empty()) {
@@ -503,7 +504,7 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
}
}
- if (Found.empty() && AllowTypoCorrection) {
+ if (Found.empty() && AllowTypoCorrection && !IsDependent) {
// If we did not find any names, and this is not a disambiguation, attempt
// to correct any typos.
DeclarationName Name = Found.getLookupName();
@@ -544,14 +545,14 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
NamedDecl *ExampleLookupResult =
Found.empty() ? nullptr : Found.getRepresentativeDecl();
- FilterAcceptableTemplateNames(
- Found,
- /*AllowFunctionTemplates=*/getLangOpts().CPlusPlus23 ||
- !ObjectTypeSearchedInScope);
+ FilterAcceptableTemplateNames(Found, getLangOpts().CPlusPlus23 ||
+ !ObjectTypeSearchedInScope);
if (Found.empty()) {
- // If a 'template' keyword was used, a lookup that finds only non-template
- // names is an error.
- if (ExampleLookupResult && RequiredTemplate) {
+ if (IsDependent) {
+ Found.setNotFoundInCurrentInstantiation();
+ } else if (ExampleLookupResult && RequiredTemplate) {
+ // If a 'template' keyword was used, a lookup that finds only non-template
+ // names is an error.
Diag(Found.getNameLoc(), diag::err_template_kw_refers_to_non_template)
<< Found.getLookupName() << SS.getRange()
<< RequiredTemplate.hasTemplateKeyword()
diff --git a/clang/test/CXX/drs/cwg13xx.cpp b/clang/test/CXX/drs/cwg13xx.cpp
index a19086b9dc90d..416de7c536b1a 100644
--- a/clang/test/CXX/drs/cwg13xx.cpp
+++ b/clang/test/CXX/drs/cwg13xx.cpp
@@ -1,8 +1,8 @@
-// RUN: %clang_cc1 -std=c++98 %s -verify=expected,cxx98-14,cxx98-20,cxx98 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++11 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,cxx98-14,cxx98-20,since-cxx11,cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++14 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,since-cxx14,cxx98-14,cxx98-20,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++17 %s -verify=expected,cxx11-20,cxx11-17,cxx98-20,since-cxx14,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++20 %s -verify=expected,cxx11-20,cxx98-20,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++98 %s -verify=expected,cxx98-14,cxx98 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++11 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,cxx98-14,since-cxx11,cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++14 %s -verify=expected,cxx11-20,cxx11-17,cxx11-14,since-cxx14,cxx98-14,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++17 %s -verify=expected,cxx11-20,cxx11-17,since-cxx14,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++20 %s -verify=expected,cxx11-20,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++23 %s -verify=expected,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++2c %s -verify=expected,since-cxx14,since-cxx20,since-cxx17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
@@ -136,7 +136,6 @@ namespace cwg1310 { // cwg1310: 5
// expected-error at -1 {{ISO C++ specifies that qualified reference to 'W' is a constructor name rather than a template name in this context, despite preceding 'template' keyword}}
}
template<typename W>
- // cxx98-20-note at -1 2{{declared as a non-template here}}
void wt_test_good() {
typename W::W::X w2ax;
typename W::template W<int>::X w4x;
@@ -147,9 +146,7 @@ namespace cwg1310 { // cwg1310: 5
(void)w.W::W::n;
(void)w.W::template W<int>::n;
(void)w.template W<int>::W::n;
- // cxx98-20-error at -1 {{'W' following the 'template' keyword does not refer to a template}}
(void)w.template W<int>::template W<int>::n;
- // cxx98-20-error at -1 {{'W' following the 'template' keyword does not refer to a template}}
}
template void wt_test<W<int> >(); // #cwg1310-W-int
template void wt_test_good<W<int> >();
>From a32df19340983eae3c01df692c7cbd740a7db271 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Mon, 22 Jul 2024 10:03:20 -0400
Subject: [PATCH 08/15] [FOLD] cleanups
---
clang/lib/AST/ExprCXX.cpp | 5 ++---
clang/lib/Parse/ParseExprCXX.cpp | 15 ++++++++-------
clang/lib/Sema/SemaExprMember.cpp | 5 ++---
clang/lib/Sema/SemaTemplate.cpp | 1 -
clang/test/SemaCXX/static-assert-cxx17.cpp | 2 +-
5 files changed, 13 insertions(+), 15 deletions(-)
diff --git a/clang/lib/AST/ExprCXX.cpp b/clang/lib/AST/ExprCXX.cpp
index e97c80141be0a..9a249a7d12ff0 100644
--- a/clang/lib/AST/ExprCXX.cpp
+++ b/clang/lib/AST/ExprCXX.cpp
@@ -1507,9 +1507,8 @@ CXXDependentScopeMemberExpr::CXXDependentScopeMemberExpr(
new (getTrailingObjects<NestedNameSpecifierLoc>())
NestedNameSpecifierLoc(QualifierLoc);
- std::uninitialized_copy_n(UnqualifiedLookups.data(),
- UnqualifiedLookups.size(),
- getTrailingObjects<DeclAccessPair>());
+ std::uninitialized_copy(UnqualifiedLookups.begin(), UnqualifiedLookups.end(),
+ getTrailingObjects<DeclAccessPair>());
if (TemplateArgs) {
auto Deps = TemplateArgumentDependence::None;
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index 8e8489461da2d..95b4a08edafea 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -354,7 +354,7 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
TemplateTy Template;
TemplateNameKind TNK = Actions.ActOnTemplateName(
getCurScope(), SS, TemplateKWLoc, TemplateName, ObjectType,
- EnteringContext, Template, /*AllowInjectedClassName*/ true,
+ EnteringContext, Template, /*AllowInjectedClassName=*/true,
/*MayBeNNS=*/true);
if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateKWLoc,
TemplateName, false))
@@ -407,6 +407,7 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
: TemplateId->TemplateNameLoc;
SS.SetInvalid(SourceRange(StartLoc, CCLoc));
}
+
continue;
}
@@ -540,7 +541,7 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
// error recovery. But before we commit to this, check that we actually
// have something that looks like a template-argument-list next.
if (!IsTypename && (ObjectType || TNK == TNK_Undeclared_template) &&
- isTemplateArgumentList(1) == TPResult::False)
+ isTemplateArgumentList(1) == TPResult::False)
break;
// We have found a template name, so annotate this token
@@ -652,10 +653,10 @@ ExprResult Parser::tryParseCXXIdExpression(CXXScopeSpec &SS,
if (isAddressOfOperand && isPostfixExpressionSuffixStart())
isAddressOfOperand = false;
- E = Actions.ActOnIdExpression(
- getCurScope(), SS, TemplateKWLoc, Name, Tok.is(tok::l_paren),
- isAddressOfOperand, /*CCC=*/nullptr, /*IsInlineAsmIdentifier=*/false,
- Replacement);
+ E = Actions.ActOnIdExpression(getCurScope(), SS, TemplateKWLoc, Name,
+ Tok.is(tok::l_paren), isAddressOfOperand,
+ /*CCC=*/nullptr,
+ /*IsInlineAsmIdentifier=*/false, Replacement);
break;
}
@@ -1917,7 +1918,7 @@ Parser::ParseCXXPseudoDestructor(Expr *Base, SourceLocation OpLoc,
// argument list. This affects examples such as
// void f(auto *p) { p->~X<int>(); }
// ... but there's no ambiguity, and nowhere to write 'template' in such an
- // example, so we accept it anyway
+ // example, so we accept it anyway.
if (Tok.is(tok::less) && ParseUnqualifiedIdTemplateId(
SS, ObjectType, Base && Base->containsErrors(),
/*TemplateKWLoc=*/SourceLocation(), TildeLoc,
diff --git a/clang/lib/Sema/SemaExprMember.cpp b/clang/lib/Sema/SemaExprMember.cpp
index 8519618bacfee..4750d5adc331d 100644
--- a/clang/lib/Sema/SemaExprMember.cpp
+++ b/clang/lib/Sema/SemaExprMember.cpp
@@ -1753,9 +1753,8 @@ ExprResult Sema::ActOnMemberAccessExpr(Scope *S, Expr *Base,
// Decompose the name into its component parts.
DeclarationNameInfo NameInfo;
const TemplateArgumentListInfo *TemplateArgs;
- DecomposeUnqualifiedId(Id, TemplateArgsBuffer,
- NameInfo, TemplateArgs);
- bool IsArrow = OpKind == tok::arrow;
+ DecomposeUnqualifiedId(Id, TemplateArgsBuffer, NameInfo, TemplateArgs);
+ bool IsArrow = (OpKind == tok::arrow);
if (getLangOpts().HLSL && IsArrow)
return ExprError(Diag(OpLoc, diag::err_hlsl_operator_unsupported) << 2);
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 17656c57bb986..bad51237d5753 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -212,7 +212,6 @@ Sema::isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword,
&AssumedTemplate,
/*AllowTypoCorrection=*/!Disambiguation, MayBeNNS))
return TNK_Non_template;
-
MemberOfUnknownSpecialization = R.wasNotFoundInCurrentInstantiation();
if (AssumedTemplate != AssumedTemplateKind::None) {
diff --git a/clang/test/SemaCXX/static-assert-cxx17.cpp b/clang/test/SemaCXX/static-assert-cxx17.cpp
index 754f4ae5f1d38..41a7b025d0eb7 100644
--- a/clang/test/SemaCXX/static-assert-cxx17.cpp
+++ b/clang/test/SemaCXX/static-assert-cxx17.cpp
@@ -96,7 +96,7 @@ void foo6() {
// expected-error at -1{{static assertion failed due to requirement 'static_cast<const X<int> *>(nullptr)'}}
static_assert((const X<typename T::T>[]){} == nullptr);
// expected-error at -1{{static assertion failed due to requirement '(const X<int>[0]){} == nullptr'}}
- static_assert(sizeof(X<decltype(X<typename T::T>().template X<typename T::T>::~X())>) == 0);
+ static_assert(sizeof(X<decltype(X<typename T::T>().X<typename T::T>::~X())>) == 0);
// expected-error at -1{{static assertion failed due to requirement 'sizeof(X<void>) == 0'}} \
// expected-note at -1 {{evaluates to '8 == 0'}}
static_assert(constexpr_return_false<typename T::T, typename T::U>());
>From fb25bb5fe2f193fe4117ee647c85b532dbc18a02 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Tue, 23 Jul 2024 11:38:35 -0400
Subject: [PATCH 09/15] [FOLD] correct annotation end loc?
---
clang/lib/Parse/ParseTemplate.cpp | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index ac50cbbb56232..fb66d77f552b2 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -1800,11 +1800,10 @@ bool Parser::isMissingTemplateKeywordBeforeScope() {
else
PP.EnterToken(Tok, /*IsReinject=*/true);
- SourceLocation EndLoc = Tok.getLocation();
- Tok.setLocation(StartLoc);
Tok.setKind(tok::annot_primary_expr);
setExprAnnotation(Tok, Result);
- Tok.setAnnotationEndLoc(EndLoc);
+ Tok.setAnnotationEndLoc(Tok.getLocation());
+ Tok.setLocation(StartLoc);
PP.AnnotateCachedTokens(Tok);
return Result.isInvalid();
}
>From 3554a8363a7d26c8401755d9c597129c8a6673a6 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Fri, 26 Jul 2024 08:39:01 -0400
Subject: [PATCH 10/15] [WIP] convert more missing 'template' errors to
warnings
---
clang/include/clang/Parse/Parser.h | 2 +-
clang/lib/Parse/ParseTemplate.cpp | 17 +++++++---
clang/lib/Parse/ParseTentative.cpp | 50 ++++++++++++++++++++++++++++++
3 files changed, 63 insertions(+), 6 deletions(-)
diff --git a/clang/include/clang/Parse/Parser.h b/clang/include/clang/Parse/Parser.h
index c02c9859b2cc5..4915bbfb8beec 100644
--- a/clang/include/clang/Parse/Parser.h
+++ b/clang/include/clang/Parse/Parser.h
@@ -1907,7 +1907,7 @@ class Parser : public CodeCompletionHandler {
}
bool diagnoseUnknownTemplateId(ExprResult TemplateName, SourceLocation Less);
- bool isMissingTemplateKeywordBeforeScope();
+ bool isMissingTemplateKeywordBeforeScope(bool AnnotateInvalid);
void checkPotentialAngleBracket(ExprResult &PotentialTemplateName);
bool checkPotentialAngleBracketDelimiter(const AngleBracketTracker::Loc &,
const Token &OpToken);
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index fb66d77f552b2..a4f9b987cde68 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -1779,7 +1779,7 @@ void Parser::checkPotentialAngleBracket(ExprResult &PotentialTemplateName) {
Priority);
}
-bool Parser::isMissingTemplateKeywordBeforeScope() {
+bool Parser::isMissingTemplateKeywordBeforeScope(bool AnnotateInvalid) {
assert(Tok.is(tok::coloncolon));
Sema::DisableTypoCorrectionRAII DTC(Actions);
ColonProtectionRAIIObject ColonProtection(*this);
@@ -1795,14 +1795,21 @@ bool Parser::isMissingTemplateKeywordBeforeScope() {
/*EnteringContext=*/false);
ExprResult Result = tryParseCXXIdExpression(SS, /*isAddressOfOperand=*/false);
- if (PP.isBacktrackEnabled())
+ if (!AnnotateInvalid && Result.isInvalid())
+ return true;
+
+ SourceLocation EndLoc = Tok.getLocation();
+ if (PP.isBacktrackEnabled()) {
PP.RevertCachedTokens(1);
- else
+ if (Result.isInvalid())
+ EndLoc = PP.getLastCachedTokenLocation();
+ } else {
PP.EnterToken(Tok, /*IsReinject=*/true);
+ }
Tok.setKind(tok::annot_primary_expr);
setExprAnnotation(Tok, Result);
- Tok.setAnnotationEndLoc(Tok.getLocation());
+ Tok.setAnnotationEndLoc(EndLoc);
Tok.setLocation(StartLoc);
PP.AnnotateCachedTokens(Tok);
return Result.isInvalid();
@@ -1833,7 +1840,7 @@ bool Parser::checkPotentialAngleBracketDelimiter(
if (OpToken.is(tok::greater) && Tok.is(tok::coloncolon) &&
!NextToken().isOneOf(tok::kw_new, tok::kw_delete) &&
- isMissingTemplateKeywordBeforeScope()) {
+ isMissingTemplateKeywordBeforeScope(/*AnnotateInvalid=*/true)) {
Actions.diagnoseExprIntendedAsTemplateName(
getCurScope(), LAngle.TemplateName, LAngle.LessLoc,
OpToken.getLocation());
diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index 0142271b8e6d1..752469705a73f 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -2320,6 +2320,56 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip) {
if (!TryConsumeToken(tok::less))
return TPResult::False;
+ while (true) {
+ // An expression cannot be followed by a braced-init-list unless
+ // its the right operand of an assignment operator.
+ if (Tok.is(tok::l_brace))
+ return TPResult::True;
+
+ bool InvalidAsTemplateArgumentList = false;
+ if (isCXXDeclarationSpecifier(ImplicitTypenameContext::No, TPResult::False,
+ &InvalidAsTemplateArgumentList) ==
+ TPResult::True)
+ return TPResult::True;
+ if (InvalidAsTemplateArgumentList)
+ return TPResult::False;
+
+ if (Tok.is(tok::l_paren)) {
+ // Skip the parens.
+ ConsumeParen();
+ if (!SkipUntil(tok::r_paren, StopAtSemi))
+ return TPResult::Error;
+ } else if (MightBeCXXScopeToken()) {
+ if (TryAnnotateCXXScopeToken())
+ return TPResult::Error;
+ }
+
+ if (!SkipUntil({tok::comma, tok::less,
+ tok::greater, tok::greatergreater, tok::greatergreatergreater},
+ StopAtSemi | StopBeforeMatch))
+ return TPResult::False;
+
+ if (Tok.isNot(tok::comma)) {
+ if (Tok.is(tok::less))
+ break;
+ if (TryConsumeToken(tok::greater) && Tok.is(tok::coloncolon)) {
+ TentativeParsingAction TPA(*this, /*Unannotated=*/true);
+ if (isMissingTemplateKeywordBeforeScope(/*AnnotateInvalid=*/false)) {
+ TPA.Revert();
+ return TPResult::True;
+ }
+ TPA.Commit();
+ }
+ #if 0
+ if (TryConsumeToken(tok::greater) && Tok.is(tok::coloncolon) &&
+ isMissingTemplateKeywordBeforeScope(/*AnnotateInvalid=*/false))
+ return TPResult::True;
+ #endif
+ return TPResult::Ambiguous;
+ }
+ ConsumeToken();
+ }
+
// We can't do much to tell an expression apart from a template-argument,
// but one good distinguishing factor is that a "decl-specifier" not
// followed by '(' or '{' can't appear in an expression.
>From 41a3a6f2133f4eefb509783e2e7686ee45e02fc2 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Fri, 26 Jul 2024 12:39:08 -0400
Subject: [PATCH 11/15] [FOLD] improve detection of missing template
---
clang/include/clang/Parse/Parser.h | 2 +-
clang/lib/Parse/ParseExprCXX.cpp | 8 ++++----
clang/lib/Parse/ParseTemplate.cpp | 9 ++++++---
clang/lib/Parse/ParseTentative.cpp | 26 ++++++++++----------------
clang/lib/Parse/Parser.cpp | 4 ++--
5 files changed, 23 insertions(+), 26 deletions(-)
diff --git a/clang/include/clang/Parse/Parser.h b/clang/include/clang/Parse/Parser.h
index 4915bbfb8beec..8b3953e092cc3 100644
--- a/clang/include/clang/Parse/Parser.h
+++ b/clang/include/clang/Parse/Parser.h
@@ -2743,7 +2743,7 @@ class Parser : public CodeCompletionHandler {
/// Determine whether the current token sequence might be
/// '<' template-argument-list '>'
/// rather than a less-than expression.
- TPResult isTemplateArgumentList(unsigned TokensToSkip);
+ TPResult isTemplateArgumentList(unsigned TokensToSkip, TemplateNameKind TNK);
/// Determine whether an '(' after an 'explicit' keyword is part of a C++20
/// 'explicit(bool)' declaration, in earlier language modes where that is an
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index 95b4a08edafea..f5a6520610075 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -541,7 +541,7 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
// error recovery. But before we commit to this, check that we actually
// have something that looks like a template-argument-list next.
if (!IsTypename && (ObjectType || TNK == TNK_Undeclared_template) &&
- isTemplateArgumentList(1) == TPResult::False)
+ isTemplateArgumentList(1, TNK) == TPResult::False)
break;
// We have found a template name, so annotate this token
@@ -560,7 +560,7 @@ bool Parser::ParseOptionalCXXScopeSpecifier(
if (MemberOfUnknownSpecialization && !Disambiguation &&
(ObjectType || SS.isSet()) &&
- (IsTypename || isTemplateArgumentList(1) == TPResult::True)) {
+ (IsTypename || isTemplateArgumentList(1, TNK_Non_template) == TPResult::True)) {
// If we had errors before, ObjectType can be dependent even without any
// templates. Do not report missing template keyword in that case.
if (!ObjectHadErrors) {
@@ -2558,11 +2558,11 @@ bool Parser::ParseUnqualifiedIdTemplateId(
// name, double-check that makes sense syntactically before committing
// to it.
if (TNK == TNK_Undeclared_template &&
- isTemplateArgumentList(0) == TPResult::False)
+ isTemplateArgumentList(0, TNK) == TPResult::False)
return false;
if (TNK == TNK_Non_template && MemberOfUnknownSpecialization &&
- ObjectType && isTemplateArgumentList(0) == TPResult::True) {
+ ObjectType && isTemplateArgumentList(0, TNK) == TPResult::True) {
// If we had errors before, ObjectType can be dependent even without any
// templates, do not report missing template keyword in that case.
if (!ObjectHadErrors) {
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index a4f9b987cde68..6e2f8faad42e6 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -1783,6 +1783,9 @@ bool Parser::isMissingTemplateKeywordBeforeScope(bool AnnotateInvalid) {
assert(Tok.is(tok::coloncolon));
Sema::DisableTypoCorrectionRAII DTC(Actions);
ColonProtectionRAIIObject ColonProtection(*this);
+ std::optional<Sema::TentativeAnalysisScope> TAS;
+ if (!AnnotateInvalid)
+ TAS.emplace(Actions);
SourceLocation StartLoc = Tok.getLocation();
if (TryAnnotateTypeOrScopeToken())
@@ -1801,16 +1804,16 @@ bool Parser::isMissingTemplateKeywordBeforeScope(bool AnnotateInvalid) {
SourceLocation EndLoc = Tok.getLocation();
if (PP.isBacktrackEnabled()) {
PP.RevertCachedTokens(1);
- if (Result.isInvalid())
- EndLoc = PP.getLastCachedTokenLocation();
+ // if (Result.isInvalid())
+ EndLoc = PP.getLastCachedTokenLocation();
} else {
PP.EnterToken(Tok, /*IsReinject=*/true);
}
Tok.setKind(tok::annot_primary_expr);
setExprAnnotation(Tok, Result);
- Tok.setAnnotationEndLoc(EndLoc);
Tok.setLocation(StartLoc);
+ Tok.setAnnotationEndLoc(EndLoc);
PP.AnnotateCachedTokens(Tok);
return Result.isInvalid();
}
diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index 752469705a73f..f6e7ffae033f3 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -2302,7 +2302,7 @@ Parser::TPResult Parser::TryParseBracketDeclarator() {
/// of a template-id or simple-template-id, rather than a less-than comparison.
/// This will often fail and produce an ambiguity, but should never be wrong
/// if it returns True or False.
-Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip) {
+Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip, TemplateNameKind TNK) {
if (!TokensToSkip) {
if (Tok.isNot(tok::less))
return TPResult::False;
@@ -2334,15 +2334,11 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip) {
if (InvalidAsTemplateArgumentList)
return TPResult::False;
- if (Tok.is(tok::l_paren)) {
- // Skip the parens.
- ConsumeParen();
- if (!SkipUntil(tok::r_paren, StopAtSemi))
- return TPResult::Error;
- } else if (MightBeCXXScopeToken()) {
- if (TryAnnotateCXXScopeToken())
- return TPResult::Error;
- }
+ if (!GreaterThanIsOperator || TNK != TNK_Non_template)
+ break;
+
+ if (TryAnnotateOptionalCXXScopeToken())
+ return TPResult::Error;
if (!SkipUntil({tok::comma, tok::less,
tok::greater, tok::greatergreater, tok::greatergreatergreater},
@@ -2352,7 +2348,8 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip) {
if (Tok.isNot(tok::comma)) {
if (Tok.is(tok::less))
break;
- if (TryConsumeToken(tok::greater) && Tok.is(tok::coloncolon)) {
+ if (TryConsumeToken(tok::greater) && Tok.is(tok::coloncolon) &&
+ !NextToken().isOneOf(tok::kw_new, tok::kw_delete)) {
TentativeParsingAction TPA(*this, /*Unannotated=*/true);
if (isMissingTemplateKeywordBeforeScope(/*AnnotateInvalid=*/false)) {
TPA.Revert();
@@ -2360,16 +2357,12 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip) {
}
TPA.Commit();
}
- #if 0
- if (TryConsumeToken(tok::greater) && Tok.is(tok::coloncolon) &&
- isMissingTemplateKeywordBeforeScope(/*AnnotateInvalid=*/false))
- return TPResult::True;
- #endif
return TPResult::Ambiguous;
}
ConsumeToken();
}
+ #if 0
// We can't do much to tell an expression apart from a template-argument,
// but one good distinguishing factor is that a "decl-specifier" not
// followed by '(' or '{' can't appear in an expression.
@@ -2380,6 +2373,7 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip) {
return TPResult::True;
if (InvalidAsTemplateArgumentList)
return TPResult::False;
+ #endif
// FIXME: In many contexts, X<thing1, Type> can only be a
// template-argument-list. But that's not true in general:
diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
index 5ebe71e496a2e..22450fe6a6339 100644
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -1826,7 +1826,7 @@ Parser::TryAnnotateName(CorrectionCandidateCallback *CCC,
// we interpret this as a template-id if it can be, but if it can't be, then
// this is an error recovery case.
if (Classification.getKind() == Sema::NC_UndeclaredTemplate &&
- isTemplateArgumentList(1) == TPResult::False) {
+ isTemplateArgumentList(1, TNK_Undeclared_template) == TPResult::False) {
// It's not a template-id; re-classify without the '<' as a hint.
Token FakeNext = Next;
FakeNext.setKind(tok::unknown);
@@ -2195,7 +2195,7 @@ bool Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(
// Only annotate an undeclared template name as a template-id if the
// following tokens have the form of a template argument list.
if (TNK != TNK_Undeclared_template ||
- isTemplateArgumentList(1) != TPResult::False) {
+ isTemplateArgumentList(1, TNK) != TPResult::False) {
// Consume the identifier.
ConsumeToken();
if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
>From 86973a89f835111ff263009c1d301c5b351fba6a Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Fri, 26 Jul 2024 16:02:09 -0400
Subject: [PATCH 12/15] [FOLD] correctly handle nested template argument lists
---
clang/lib/Parse/ParseTentative.cpp | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index f6e7ffae033f3..7c71c09918ff3 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -13,6 +13,7 @@
#include "clang/Parse/Parser.h"
#include "clang/Parse/ParseDiagnostic.h"
+#include "clang/Parse/RAIIObjectsForParser.h"
#include "clang/Sema/ParsedTemplate.h"
using namespace clang;
@@ -2320,6 +2321,9 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip, TemplateN
if (!TryConsumeToken(tok::less))
return TPResult::False;
+ bool IsNestedTemplateArgumentList = !GreaterThanIsOperator;
+ GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
+
while (true) {
// An expression cannot be followed by a braced-init-list unless
// its the right operand of an assignment operator.
@@ -2334,7 +2338,7 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip, TemplateN
if (InvalidAsTemplateArgumentList)
return TPResult::False;
- if (!GreaterThanIsOperator || TNK != TNK_Non_template)
+ if (IsNestedTemplateArgumentList || TNK != TNK_Non_template)
break;
if (TryAnnotateOptionalCXXScopeToken())
>From a8729dde36cbce79418b9e8559671ae19ca931c5 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Fri, 26 Jul 2024 16:25:34 -0400
Subject: [PATCH 13/15] [FOLD] apply cwg1835 in all c++ language modes
---
clang/lib/Sema/SemaTemplate.cpp | 66 +++++++++----------
.../class.derived/class.member.lookup/p8.cpp | 4 +-
clang/test/CXX/drs/cwg1xx.cpp | 18 +++--
clang/test/SemaCXX/pseudo-destructors.cpp | 10 ++-
clang/test/SemaCXX/static-assert-cxx17.cpp | 3 +-
.../dependent-template-recover.cpp | 8 ++-
6 files changed, 51 insertions(+), 58 deletions(-)
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index bad51237d5753..ea615aa18c2e2 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -409,36 +409,6 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
LookupParsedName(Found, S, &SS, ObjectType,
/*AllowBuiltinCreation=*/false, EnteringContext);
- bool IsDependent = Found.wasNotFoundInCurrentInstantiation();
-
- bool ObjectTypeSearchedInScope = false;
-
- // C++ [basic.lookup.qual.general]p2:
- // A member-qualified name is the (unique) component name, if any, of
- // - an unqualified-id or
- // - a nested-name-specifier of the form type-name :: or namespace-name ::
- // in the id-expression of a class member access expression.
- //
- // C++ [basic.lookup.qual.general]p3:
- // [...] If nothing is found by qualified lookup for a member-qualified
- // name that is the terminal name of a nested-name-specifier and is not
- // dependent, it undergoes unqualified lookup.
- //
- // In 'x.A::B::y', 'A' will undergo unqualified lookup if qualified lookup
- // in the type of 'x' finds nothing. If the lookup context is dependent,
- // we perform the unqualified lookup in the template definition context
- // and store the results so we can replicate the lookup during instantiation.
- if (MayBeNNS && Found.empty() && !ObjectType.isNull() &&
- (!getLangOpts().CPlusPlus23 || !IsDependent)) {
- if (S) {
- LookupName(Found, S);
- } else if (!SS.getUnqualifiedLookups().empty()) {
- Found.addAllDecls(SS.getUnqualifiedLookups());
- Found.resolveKind();
- }
- ObjectTypeSearchedInScope = true;
- }
-
// C++ [basic.lookup.qual.general]p3:
// [...] Unless otherwise specified, a qualified name undergoes qualified
// name lookup in its lookup context from the point where it appears unless
@@ -474,6 +444,33 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
if (Found.wasNotFoundInCurrentInstantiation())
return false;
+ bool ObjectTypeSearchedInScope = false;
+
+ // C++ [basic.lookup.qual.general]p2:
+ // A member-qualified name is the (unique) component name, if any, of
+ // - an unqualified-id or
+ // - a nested-name-specifier of the form type-name :: or namespace-name ::
+ // in the id-expression of a class member access expression.
+ //
+ // C++ [basic.lookup.qual.general]p3:
+ // [...] If nothing is found by qualified lookup for a member-qualified
+ // name that is the terminal name of a nested-name-specifier and is not
+ // dependent, it undergoes unqualified lookup.
+ //
+ // In 'x.A::B::y', 'A' will undergo unqualified lookup if qualified lookup
+ // in the type of 'x' finds nothing. If the lookup context is dependent,
+ // we perform the unqualified lookup in the template definition context
+ // and store the results so we can replicate the lookup during instantiation.
+ if (MayBeNNS && Found.empty() && !ObjectType.isNull()) {
+ if (S) {
+ LookupName(Found, S);
+ } else if (!SS.getUnqualifiedLookups().empty()) {
+ Found.addAllDecls(SS.getUnqualifiedLookups());
+ Found.resolveKind();
+ }
+ ObjectTypeSearchedInScope = true;
+ }
+
if (Found.isAmbiguous())
return false;
@@ -503,7 +500,7 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
}
}
- if (Found.empty() && AllowTypoCorrection && !IsDependent) {
+ if (Found.empty() && AllowTypoCorrection) {
// If we did not find any names, and this is not a disambiguation, attempt
// to correct any typos.
DeclarationName Name = Found.getLookupName();
@@ -544,12 +541,9 @@ bool Sema::LookupTemplateName(LookupResult &Found, Scope *S, CXXScopeSpec &SS,
NamedDecl *ExampleLookupResult =
Found.empty() ? nullptr : Found.getRepresentativeDecl();
- FilterAcceptableTemplateNames(Found, getLangOpts().CPlusPlus23 ||
- !ObjectTypeSearchedInScope);
+ FilterAcceptableTemplateNames(Found);
if (Found.empty()) {
- if (IsDependent) {
- Found.setNotFoundInCurrentInstantiation();
- } else if (ExampleLookupResult && RequiredTemplate) {
+ if (ExampleLookupResult && RequiredTemplate) {
// If a 'template' keyword was used, a lookup that finds only non-template
// names is an error.
Diag(Found.getNameLoc(), diag::err_template_kw_refers_to_non_template)
diff --git a/clang/test/CXX/class.derived/class.member.lookup/p8.cpp b/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
index 78e83c0ab4566..19fc0644be1b0 100644
--- a/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
+++ b/clang/test/CXX/class.derived/class.member.lookup/p8.cpp
@@ -47,8 +47,8 @@ template<typename T>
void DerivedT<T>::Inner() {
Derived1T<T>::Foo();
Derived2T<T>::Member = 42;
- this->Derived1T<T>::Foo();
- this->Derived2T<T>::Member = 42;
+ this->Derived1T<T>::Foo(); // expected-warning {{use 'template' keyword to treat 'Derived1T' as a dependent template name}}
+ this->Derived2T<T>::Member = 42; // expected-warning {{use 'template' keyword to treat 'Derived2T' as a dependent template name}}
this->Foo(); // expected-error{{non-static member 'Foo' found in multiple base-class subobjects of type 'BaseT<int>'}}
}
diff --git a/clang/test/CXX/drs/cwg1xx.cpp b/clang/test/CXX/drs/cwg1xx.cpp
index 86fe56a19b15f..6bca460818425 100644
--- a/clang/test/CXX/drs/cwg1xx.cpp
+++ b/clang/test/CXX/drs/cwg1xx.cpp
@@ -1,9 +1,9 @@
-// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected,cxx98,cxx98-11,cxx98-14,cxx98-17,cxx98-20 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-11,cxx98-14,cxx98-17,cxx98-20,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-14,cxx98-17,cxx98-20,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,cxx98-17,cxx98-20 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,cxx98-20 -fexceptions -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,since-cxx23 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected,cxx98,cxx98-11,cxx98-14,cxx98-17 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-11,cxx98-14,cxx98-17,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,cxx98-14,cxx98-17,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17,cxx98-17 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
#if __cplusplus == 199711L
#define static_assert(...) __extension__ _Static_assert(__VA_ARGS__)
@@ -617,8 +617,6 @@ namespace cwg141 { // cwg141: 3.1
// expected-note@#cwg141-S {{'::cwg141::S<int>::n' declared here}}
b.f<int>();
// expected-error at -1 {{no member named 'f' in 'cwg141::B'}}
- // cxx98-20-error at -2 {{expected '(' for function-style cast or type construction}}
- // cxx98-20-error at -3 {{expected expression}}
(void)b.S<int>::n;
}
template<typename T> struct C {
@@ -629,11 +627,11 @@ namespace cwg141 { // cwg141: 3.1
}
void h() {
(void)t.S<int>::n;
- // since-cxx23-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
+ // expected-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
}
void i() {
(void)t.S<int>();
- // since-cxx23-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
+ // expected-error at -1 {{use 'template' keyword to treat 'S' as a dependent template name}}
}
};
void h() { C<B>().h(); } // ok
diff --git a/clang/test/SemaCXX/pseudo-destructors.cpp b/clang/test/SemaCXX/pseudo-destructors.cpp
index a630c54bd0bec..c474a2c4351b8 100644
--- a/clang/test/SemaCXX/pseudo-destructors.cpp
+++ b/clang/test/SemaCXX/pseudo-destructors.cpp
@@ -1,5 +1,4 @@
-// RUN: %clang_cc1 -emit-llvm-only -std=c++11 -verify=expected,cxx98-20 %s
-// RUN: %clang_cc1 -emit-llvm-only -std=c++23 -verify=expected,since-cxx23 %s
+// RUN: %clang_cc1 -emit-llvm-only -verify -std=c++11 %s
struct A {};
enum Foo { F };
@@ -149,13 +148,12 @@ namespace TwoPhaseLookup {
namespace Template {
template<typename T> struct Y {};
template<class U> using G = Y<U>;
- template<typename T> void f(T *p) { p->~G<int>(); } // since-cxx23-error {{no member named 'G'}}
- // cxx98-20-error at -1 {{no member named '~Y' in 'TwoPhaseLookup::Template::N::G<int>'}}
+ template<typename T> void f(T *p) { p->~G<int>(); } // expected-error {{no member named 'G'}}
void h1(Y<int> *p) { p->~G<int>(); }
- void h2(Y<int> *p) { f(p); } // since-cxx23-note {{in instantiation of}}
+ void h2(Y<int> *p) { f(p); } // expected-note {{in instantiation of}}
namespace N { template<typename T> struct G {}; }
void h3(N::G<int> *p) { p->~G<int>(); }
- void h4(N::G<int> *p) { f(p); } // cxx98-20-note {{in instantiation of}}
+ void h4(N::G<int> *p) { f(p); }
}
namespace TemplateUndeclared {
diff --git a/clang/test/SemaCXX/static-assert-cxx17.cpp b/clang/test/SemaCXX/static-assert-cxx17.cpp
index 41a7b025d0eb7..2ac52a767773f 100644
--- a/clang/test/SemaCXX/static-assert-cxx17.cpp
+++ b/clang/test/SemaCXX/static-assert-cxx17.cpp
@@ -98,7 +98,8 @@ void foo6() {
// expected-error at -1{{static assertion failed due to requirement '(const X<int>[0]){} == nullptr'}}
static_assert(sizeof(X<decltype(X<typename T::T>().X<typename T::T>::~X())>) == 0);
// expected-error at -1{{static assertion failed due to requirement 'sizeof(X<void>) == 0'}} \
- // expected-note at -1 {{evaluates to '8 == 0'}}
+ // expected-note at -1 {{evaluates to '8 == 0'}} \
+ // expected-warning at -1 {{use 'template' keyword to treat 'X' as a dependent template name}}
static_assert(constexpr_return_false<typename T::T, typename T::U>());
// expected-error at -1{{static assertion failed due to requirement 'constexpr_return_false<int, float>()'}}
}
diff --git a/clang/test/SemaTemplate/dependent-template-recover.cpp b/clang/test/SemaTemplate/dependent-template-recover.cpp
index c763989e6dadb..1a41e5e9ac79f 100644
--- a/clang/test/SemaTemplate/dependent-template-recover.cpp
+++ b/clang/test/SemaTemplate/dependent-template-recover.cpp
@@ -7,7 +7,7 @@ struct X {
t->operator+<U const, 1>(1); // expected-warning{{use 'template' keyword to treat 'operator +' as a dependent template name}}
t->f1<int const, 2>(1); // expected-warning{{use 'template' keyword to treat 'f1' as a dependent template name}}
- t->f1<3, int const>(1); // expected-error{{missing 'template' keyword prior to dependent template name 'f1'}}
+ t->f1<3, int const>(1); // expected-warning{{use 'template' keyword to treat 'f1' as a dependent template name}}
T::getAs<U>(); // expected-warning{{use 'template' keyword to treat 'getAs' as a dependent template name}}
t->T::getAs<U>(); // expected-warning{{use 'template' keyword to treat 'getAs' as a dependent template name}}
@@ -15,7 +15,7 @@ struct X {
(*t).f2<N>(); // expected-error{{missing 'template' keyword prior to dependent template name 'f2'}}
(*t).f2<0>(); // expected-error{{missing 'template' keyword prior to dependent template name 'f2'}}
T::f2<0>(); // expected-error{{missing 'template' keyword prior to dependent template name 'f2'}}
- T::f2<0, int>(0); // expected-error{{missing 'template' keyword prior to dependent template name 'f2'}}
+ T::f2<0, int>(0); // expected-warning{{use 'template' keyword to treat 'f2' as a dependent template name}}
T::foo<N < 2 || N >= 4>(); // expected-error{{missing 'template' keyword prior to dependent template name 'foo'}}
@@ -83,12 +83,14 @@ template<int N, typename T> void f(T t) {
T::g<mb>(0);
// ... but this one must be a template-id.
- T::g<mb, int>(0); // expected-error {{missing 'template' keyword prior to dependent template name 'g'}}
+ T::g<mb, int>(0); // expected-warning {{use 'template' keyword to treat 'g' as a dependent template name}}
+ // expected-error at -1 {{no matching function for call to 'g'}}
}
struct Y {
template <int> void f(int);
template <int = 0> static void g(int); // expected-warning 0-1{{extension}}
+ // expected-note at -1 {{candidate template ignored: invalid explicitly-specified argument for 1st template parameter}}
};
void q() { void (*p)(int) = Y::g; }
template void f<0>(Y); // expected-note {{in instantiation of}}
>From 2f275f896b7db9864d0e331af07685eca55c7317 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Tue, 30 Jul 2024 09:35:21 -0400
Subject: [PATCH 14/15] [FOLD] further improvements to skipping template
argument lists
---
clang/include/clang/Parse/Parser.h | 1 +
clang/lib/Parse/ParseTemplate.cpp | 3 -
clang/lib/Parse/ParseTentative.cpp | 159 ++++++++++++++++++++++++++---
3 files changed, 148 insertions(+), 15 deletions(-)
diff --git a/clang/include/clang/Parse/Parser.h b/clang/include/clang/Parse/Parser.h
index 8b3953e092cc3..8f0c079e1133b 100644
--- a/clang/include/clang/Parse/Parser.h
+++ b/clang/include/clang/Parse/Parser.h
@@ -2766,6 +2766,7 @@ class Parser : public CodeCompletionHandler {
TPResult TryParseTypeofSpecifier();
TPResult TryParseProtocolQualifiers();
TPResult TryParsePtrOperatorSeq();
+ TPResult TryParseNonConversionOperatorId();
TPResult TryParseOperatorId();
TPResult TryParseInitDeclaratorList(bool MayHaveTrailingReturnType = false);
TPResult TryParseDeclarator(bool mayBeAbstract, bool mayHaveIdentifier = true,
diff --git a/clang/lib/Parse/ParseTemplate.cpp b/clang/lib/Parse/ParseTemplate.cpp
index 6e2f8faad42e6..d50e57582be71 100644
--- a/clang/lib/Parse/ParseTemplate.cpp
+++ b/clang/lib/Parse/ParseTemplate.cpp
@@ -1783,9 +1783,6 @@ bool Parser::isMissingTemplateKeywordBeforeScope(bool AnnotateInvalid) {
assert(Tok.is(tok::coloncolon));
Sema::DisableTypoCorrectionRAII DTC(Actions);
ColonProtectionRAIIObject ColonProtection(*this);
- std::optional<Sema::TentativeAnalysisScope> TAS;
- if (!AnnotateInvalid)
- TAS.emplace(Actions);
SourceLocation StartLoc = Tok.getLocation();
if (TryAnnotateTypeOrScopeToken())
diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index 7c71c09918ff3..dbf9e36d8340a 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -955,7 +955,7 @@ Parser::TPResult Parser::TryParsePtrOperatorSeq() {
/// literal-operator-id:
/// 'operator' string-literal identifier
/// 'operator' user-defined-string-literal
-Parser::TPResult Parser::TryParseOperatorId() {
+Parser::TPResult Parser::TryParseNonConversionOperatorId() {
assert(Tok.is(tok::kw_operator));
ConsumeToken();
@@ -1013,6 +1013,13 @@ Parser::TPResult Parser::TryParseOperatorId() {
return TPResult::True;
}
+ return TPResult::False;
+}
+Parser::TPResult Parser::TryParseOperatorId() {
+ if (TPResult TPR = TryParseNonConversionOperatorId();
+ TPR != TPResult::False)
+ return TPR;
+
// Maybe this is a conversion-function-id.
bool AnyDeclSpecifiers = false;
while (true) {
@@ -2324,37 +2331,166 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip, TemplateN
bool IsNestedTemplateArgumentList = !GreaterThanIsOperator;
GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
+ auto TrySkipTemplateArgument = [&]() {
+ bool NextIsTemplateId = false;
+ unsigned TemplateDepth = 0;
+ while (true) {
+ switch (Tok.getKind()) {
+ case tok::eof:
+ case tok::annot_module_begin:
+ case tok::annot_module_end:
+ case tok::annot_module_include:
+ case tok::annot_repl_input_end:
+ case tok::semi:
+ return TPResult::False;
+
+ case tok::comma:
+ case tok::greater:
+ case tok::greatergreater:
+ case tok::greatergreatergreater:
+ return TPResult::True;
+
+ case tok::l_paren:
+ ConsumeParen();
+ if (!SkipUntil(tok::r_paren, StopAtSemi))
+ return TPResult::Error;
+ break;
+ case tok::l_brace:
+ ConsumeBrace();
+ if (!SkipUntil(tok::r_brace, StopAtSemi))
+ return TPResult::Error;
+ break;
+ case tok::l_square:
+ ConsumeBracket();
+ if (!SkipUntil(tok::r_square, StopAtSemi))
+ return TPResult::Error;
+ break;
+ case tok::question:
+ ConsumeToken();
+ if (!SkipUntil(tok::colon, StopAtSemi))
+ return TPResult::Error;
+ break;
+
+ #if 0
+ case tok::kw_template:
+ ConsumeToken();
+ NextIsTemplateId = true;
+ continue;
+ #endif
+ case tok::identifier:
+ ConsumeToken();
+ #if 0
+ if (Tok.is(tok::less)) {
+ if (!NextIsTemplateId)
+ return TPResult::Ambiguous;
+ ConsumeToken();
+ if (!SkipUntil({tok::greater, tok::greatergreater, tok::greatergreatergreater}, StopAtSemi))
+ return TPResult::Error;
+ break;
+ }
+ #else
+ if (Tok.is(tok::less))
+ return TPResult::Ambiguous;
+ break;
+ #endif
+
+ case tok::kw_operator:
+ if (TPResult TPR = TryParseNonConversionOperatorId();
+ TPR == TPResult::Error) {
+ return TPResult::Error;
+ } else if (TPR == TPResult::True) {
+ if (Tok.is(tok::less))
+ return TPResult::Ambiguous;
+ }
+ break;
+
+ #if 0
+ if (Tok.is(tok::less)) {
+ if (!NextIsTemplateId)
+ return TPResult::Ambiguous;
+ ConsumeToken();
+ if (!SkipUntil({tok::greater, tok::greatergreater, tok::greatergreatergreater}, StopAtSemi))
+ return TPResult::Error;
+ }
+ break;
+ #endif
+
+ case tok::kw_const_cast:
+ case tok::kw_dynamic_cast:
+ case tok::kw_reinterpret_cast:
+ case tok::kw_static_cast: {
+ ConsumeToken();
+ if (!TryConsumeToken(tok::less))
+ return TPResult::Error;
+ bool MayHaveTrailingReturnType = Tok.is(tok::kw_auto);
+
+ while (true) {
+ TPResult TPR = isCXXDeclarationSpecifier(ImplicitTypenameContext::Yes);
+ if (TPR == TPResult::False)
+ break;
+ if (TPR == TPResult::Error ||
+ TryConsumeDeclarationSpecifier() == TPResult::Error)
+ return TPResult::Error;
+ }
+
+ if (TryParseDeclarator(
+ /*mayBeAbstract=*/true,
+ /*mayHaveIdentifier=*/false,
+ /*mayHaveDirectInit=*/false,
+ /*mayHaveTrailingReturnType=*/MayHaveTrailingReturnType) == TPResult::Error)
+ return TPResult::Error;
+
+ if (!TryConsumeToken(tok::greater))
+ return TPResult::Error;
+ break;
+ }
+ default:
+ ConsumeAnyToken();
+ break;
+ }
+ NextIsTemplateId = false;
+ }
+ };
+
while (true) {
// An expression cannot be followed by a braced-init-list unless
// its the right operand of an assignment operator.
if (Tok.is(tok::l_brace))
return TPResult::True;
+ if (TryAnnotateOptionalCXXScopeToken())
+ return TPResult::Error;
+
bool InvalidAsTemplateArgumentList = false;
- if (isCXXDeclarationSpecifier(ImplicitTypenameContext::No, TPResult::False,
- &InvalidAsTemplateArgumentList) ==
- TPResult::True)
- return TPResult::True;
+ TPResult TPR = isCXXDeclarationSpecifier(ImplicitTypenameContext::No,
+ /*BracedCastResult=*/TPResult::Ambiguous,
+ &InvalidAsTemplateArgumentList);
if (InvalidAsTemplateArgumentList)
return TPResult::False;
+ if (TPR == TPResult::True)
+ return TPResult::True;
+
if (IsNestedTemplateArgumentList || TNK != TNK_Non_template)
break;
- if (TryAnnotateOptionalCXXScopeToken())
- return TPResult::Error;
+ if (TPR == TPResult::Ambiguous)
+ TryConsumeDeclarationSpecifier();
+
+ TPR = TrySkipTemplateArgument();
- if (!SkipUntil({tok::comma, tok::less,
- tok::greater, tok::greatergreater, tok::greatergreatergreater},
- StopAtSemi | StopBeforeMatch))
+ if (TPR == TPResult::Error)
+ return TPResult::Error;
+ else if (TPR == TPResult::False)
return TPResult::False;
- if (Tok.isNot(tok::comma)) {
+ if (!TryConsumeToken(tok::comma)) {
if (Tok.is(tok::less))
break;
if (TryConsumeToken(tok::greater) && Tok.is(tok::coloncolon) &&
!NextToken().isOneOf(tok::kw_new, tok::kw_delete)) {
TentativeParsingAction TPA(*this, /*Unannotated=*/true);
+ Sema::TentativeAnalysisScope TAS(Actions);
if (isMissingTemplateKeywordBeforeScope(/*AnnotateInvalid=*/false)) {
TPA.Revert();
return TPResult::True;
@@ -2363,7 +2499,6 @@ Parser::TPResult Parser::isTemplateArgumentList(unsigned TokensToSkip, TemplateN
}
return TPResult::Ambiguous;
}
- ConsumeToken();
}
#if 0
>From e3829cd5d915958101e094a6354869a755198083 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian at gmail.com>
Date: Tue, 30 Jul 2024 11:06:30 -0400
Subject: [PATCH 15/15] [FOLD] update test
---
clang/test/CXX/dcl.decl/dcl.meaning/dcl.mptr/p2.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/clang/test/CXX/dcl.decl/dcl.meaning/dcl.mptr/p2.cpp b/clang/test/CXX/dcl.decl/dcl.meaning/dcl.mptr/p2.cpp
index a06b107755596..33fb2b5fa82d8 100644
--- a/clang/test/CXX/dcl.decl/dcl.meaning/dcl.mptr/p2.cpp
+++ b/clang/test/CXX/dcl.decl/dcl.meaning/dcl.mptr/p2.cpp
@@ -36,7 +36,7 @@ template<typename T>
int A0<T>::template C2<int>::D1::* f6();
template<typename T>
-int A0<T>::template C0<int>::E0<int>::* f7(); // expected-error {{use 'template' keyword to treat 'E0' as a dependent template name}}
+int A0<T>::template C0<int>::E0<int>::* f7(); // expected-warning {{use 'template' keyword to treat 'E0' as a dependent template name}}
// expected-error at -1 {{expected unqualified-id}}
template<typename T>
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